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# Unit1

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### Unit1

1. 1. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Counting numbers Matem´ticas 1o E.S.O. a Alberto Pardo Milan´s e -
2. 2. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises 1 Numbers 2 Ordinal numbers 3 Basic operations and expressions 4 Powers 5 Order of Operations 6 ExercisesAlberto Pardo Milan´s e Counting numbers
3. 3. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises NumbersAlberto Pardo Milan´s e Counting numbers
4. 4. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Numbers Natural numbers IN is the set of natural numbers, also called counting numbers. IN = {1, 2, 3, 4 . . . }. Whole numbers are {0, 1, 2, 3, 4 . . . }. Read • 0 Zero • 5 Five • 1 One • 6 Six • 2 Two • 7 Seven • 3 Three • 8 Eight • 4 Four • 9 NineAlberto Pardo Milan´s e Counting numbers
5. 5. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Numbers Natural numbers IN is the set of natural numbers, also called counting numbers. IN = {1, 2, 3, 4 . . . }. Whole numbers are {0, 1, 2, 3, 4 . . . }. Read • 0 Zero • 5 Five • 1 One • 6 Six • 2 Two • 7 Seven • 3 Three • 8 Eight • 4 Four • 9 NineAlberto Pardo Milan´s e Counting numbers
6. 6. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Numbers Natural numbers IN is the set of natural numbers, also called counting numbers. IN = {1, 2, 3, 4 . . . }. Whole numbers are {0, 1, 2, 3, 4 . . . }. Read • 0 Zero • 5 Five • 1 One • 6 Six • 2 Two • 7 Seven • 3 Three • 8 Eight • 4 Four • 9 NineAlberto Pardo Milan´s e Counting numbers
7. 7. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Numbers Natural numbers IN is the set of natural numbers, also called counting numbers. IN = {1, 2, 3, 4 . . . }. Whole numbers are {0, 1, 2, 3, 4 . . . }. Read • 0 Zero • 5 Five • 1 One • 6 Six • 2 Two • 7 Seven • 3 Three • 8 Eight • 4 Four • 9 NineAlberto Pardo Milan´s e Counting numbers
8. 8. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Numbers Natural numbers IN is the set of natural numbers, also called counting numbers. IN = {1, 2, 3, 4 . . . }. Whole numbers are {0, 1, 2, 3, 4 . . . }. Read • 0 Zero • 5 Five • 1 One • 6 Six • 2 Two • 7 Seven • 3 Three • 8 Eight • 4 Four • 9 NineAlberto Pardo Milan´s e Counting numbers
9. 9. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Numbers Natural numbers IN is the set of natural numbers, also called counting numbers. IN = {1, 2, 3, 4 . . . }. Whole numbers are {0, 1, 2, 3, 4 . . . }. Read • 0 Zero • 5 Five • 1 One • 6 Six • 2 Two • 7 Seven • 3 Three • 8 Eight • 4 Four • 9 NineAlberto Pardo Milan´s e Counting numbers
10. 10. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Numbers Natural numbers IN is the set of natural numbers, also called counting numbers. IN = {1, 2, 3, 4 . . . }. Whole numbers are {0, 1, 2, 3, 4 . . . }. Read • 0 Zero • 5 Five • 1 One • 6 Six • 2 Two • 7 Seven • 3 Three • 8 Eight • 4 Four • 9 NineAlberto Pardo Milan´s e Counting numbers
11. 11. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Numbers Natural numbers IN is the set of natural numbers, also called counting numbers. IN = {1, 2, 3, 4 . . . }. Whole numbers are {0, 1, 2, 3, 4 . . . }. Read • 0 Zero • 5 Five • 1 One • 6 Six • 2 Two • 7 Seven • 3 Three • 8 Eight • 4 Four • 9 NineAlberto Pardo Milan´s e Counting numbers
12. 12. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Numbers Natural numbers IN is the set of natural numbers, also called counting numbers. IN = {1, 2, 3, 4 . . . }. Whole numbers are {0, 1, 2, 3, 4 . . . }. Read • 0 Zero • 5 Five • 1 One • 6 Six • 2 Two • 7 Seven • 3 Three • 8 Eight • 4 Four • 9 NineAlberto Pardo Milan´s e Counting numbers
13. 13. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Numbers Natural numbers IN is the set of natural numbers, also called counting numbers. IN = {1, 2, 3, 4 . . . }. Whole numbers are {0, 1, 2, 3, 4 . . . }. Read • 0 Zero • 5 Five • 1 One • 6 Six • 2 Two • 7 Seven • 3 Three • 8 Eight • 4 Four • 9 NineAlberto Pardo Milan´s e Counting numbers
14. 14. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Numbers • 30 Thirty • 10 Ten • 40 Forty • 11 Eleven • 50 Fifty • 12 Twelve • 60 Sixty • 13 Thirteen • 70 Seventy • 14 Fourteen • 80 Eighty • 15 Fifteen • 90 Ninety • 16 Sixteen • 100 A/one hundred • 17 Seventeen • 200 Two hundred • 18 Eighteen • 300 Three hundred • 19 Nineteen • 400 Four hundred • 20 Twenty • 600 Six hundred • 21 Twenty-one • 800 Eight hundred • 900 Nine hundredAlberto Pardo Milan´s e Counting numbers
15. 15. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Numbers • 30 Thirty • 10 Ten • 40 Forty • 11 Eleven • 50 Fifty • 12 Twelve • 60 Sixty • 13 Thirteen • 70 Seventy • 14 Fourteen • 80 Eighty • 15 Fifteen • 90 Ninety • 16 Sixteen • 100 A/one hundred • 17 Seventeen • 200 Two hundred • 18 Eighteen • 300 Three hundred • 19 Nineteen • 400 Four hundred • 20 Twenty • 600 Six hundred • 21 Twenty-one • 800 Eight hundred • 900 Nine hundredAlberto Pardo Milan´s e Counting numbers
16. 16. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Numbers • 30 Thirty • 10 Ten • 40 Forty • 11 Eleven • 50 Fifty • 12 Twelve • 60 Sixty • 13 Thirteen • 70 Seventy • 14 Fourteen • 80 Eighty • 15 Fifteen • 90 Ninety • 16 Sixteen • 100 A/one hundred • 17 Seventeen • 200 Two hundred • 18 Eighteen • 300 Three hundred • 19 Nineteen • 400 Four hundred • 20 Twenty • 600 Six hundred • 21 Twenty-one • 800 Eight hundred • 900 Nine hundredAlberto Pardo Milan´s e Counting numbers
17. 17. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Numbers • 30 Thirty • 10 Ten • 40 Forty • 11 Eleven • 50 Fifty • 12 Twelve • 60 Sixty • 13 Thirteen • 70 Seventy • 14 Fourteen • 80 Eighty • 15 Fifteen • 90 Ninety • 16 Sixteen • 100 A/one hundred • 17 Seventeen • 200 Two hundred • 18 Eighteen • 300 Three hundred • 19 Nineteen • 400 Four hundred • 20 Twenty • 600 Six hundred • 21 Twenty-one • 800 Eight hundred • 900 Nine hundredAlberto Pardo Milan´s e Counting numbers
18. 18. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Numbers • 30 Thirty • 10 Ten • 40 Forty • 11 Eleven • 50 Fifty • 12 Twelve • 60 Sixty • 13 Thirteen • 70 Seventy • 14 Fourteen • 80 Eighty • 15 Fifteen • 90 Ninety • 16 Sixteen • 100 A/one hundred • 17 Seventeen • 200 Two hundred • 18 Eighteen • 300 Three hundred • 19 Nineteen • 400 Four hundred • 20 Twenty • 600 Six hundred • 21 Twenty-one • 800 Eight hundred • 900 Nine hundredAlberto Pardo Milan´s e Counting numbers
19. 19. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Numbers Large numbers We can use commas to write large numbers. . . • 1, 000 A/one thousand • 1, 001 A/one thousand one • 2, 000 Two thousand • 10, 000 Ten thousand • 100, 000 A/one hundred thousand • 1, 000, 000 A/one millionAlberto Pardo Milan´s e Counting numbers
20. 20. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Numbers Large numbers We can use commas to write large numbers. . . • 1, 000 A/one thousand • 1, 001 A/one thousand one • 2, 000 Two thousand • 10, 000 Ten thousand • 100, 000 A/one hundred thousand • 1, 000, 000 A/one millionAlberto Pardo Milan´s e Counting numbers
21. 21. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Numbers Large numbers We can use commas to write large numbers. . . • 1, 000 A/one thousand • 1, 001 A/one thousand one • 2, 000 Two thousand • 10, 000 Ten thousand • 100, 000 A/one hundred thousand • 1, 000, 000 A/one millionAlberto Pardo Milan´s e Counting numbers
22. 22. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Ordinal numbersAlberto Pardo Milan´s e Counting numbers
23. 23. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Ordinal numbers An ordinal number describes the numerical position of an object. • 1st First • 11th Eleventh • 2nd Second • 12th Twelfth • 3rd Third • 13th Thirteenth • 4th Fourth • 14th Fourteenth • 5th Fifth • 15th Fifteenth • 6th Sixth • 16th Sixteenth • 7th Seventh • 17th Seventeenth • 8th Eighth • 18th Eighteenth • 9th Ninth • 19th Nineteenth • 10th Tenth • 20th TwentiethAlberto Pardo Milan´s e Counting numbers
24. 24. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Ordinal numbers An ordinal number describes the numerical position of an object. • 1st First • 11th Eleventh • 2nd Second • 12th Twelfth • 3rd Third • 13th Thirteenth • 4th Fourth • 14th Fourteenth • 5th Fifth • 15th Fifteenth • 6th Sixth • 16th Sixteenth • 7th Seventh • 17th Seventeenth • 8th Eighth • 18th Eighteenth • 9th Ninth • 19th Nineteenth • 10th Tenth • 20th TwentiethAlberto Pardo Milan´s e Counting numbers
25. 25. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Ordinal numbers An ordinal number describes the numerical position of an object. • 1st First • 11th Eleventh • 2nd Second • 12th Twelfth • 3rd Third • 13th Thirteenth • 4th Fourth • 14th Fourteenth • 5th Fifth • 15th Fifteenth • 6th Sixth • 16th Sixteenth • 7th Seventh • 17th Seventeenth • 8th Eighth • 18th Eighteenth • 9th Ninth • 19th Nineteenth • 10th Tenth • 20th TwentiethAlberto Pardo Milan´s e Counting numbers
26. 26. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Ordinal numbers • 21st Twenty-ﬁrst • 52nd Fifty-second • 22nd Twenty-second • 63rd Sixty-third • 23rd Twenty-third • 70th Seventieth • 24th Twenty-fourth • 80th Eightieth • 25th Twenty-ﬁfth • 90th Ninetieth • 30th Thirtieth • 91st Ninety-ﬁrst • 31st Thirty-ﬁrst • 100th Hundredth • 41st Forty-ﬁrst • 101st Hundred and ﬁrstAlberto Pardo Milan´s e Counting numbers
27. 27. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Ordinal numbers • 21st Twenty-ﬁrst • 52nd Fifty-second • 22nd Twenty-second • 63rd Sixty-third • 23rd Twenty-third • 70th Seventieth • 24th Twenty-fourth • 80th Eightieth • 25th Twenty-ﬁfth • 90th Ninetieth • 30th Thirtieth • 91st Ninety-ﬁrst • 31st Thirty-ﬁrst • 100th Hundredth • 41st Forty-ﬁrst • 101st Hundred and ﬁrstAlberto Pardo Milan´s e Counting numbers
28. 28. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Ordinal numbers • 21st Twenty-ﬁrst • 52nd Fifty-second • 22nd Twenty-second • 63rd Sixty-third • 23rd Twenty-third • 70th Seventieth • 24th Twenty-fourth • 80th Eightieth • 25th Twenty-ﬁfth • 90th Ninetieth • 30th Thirtieth • 91st Ninety-ﬁrst • 31st Thirty-ﬁrst • 100th Hundredth • 41st Forty-ﬁrst • 101st Hundred and ﬁrstAlberto Pardo Milan´s e Counting numbers
29. 29. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Basic operations and expressionsAlberto Pardo Milan´s e Counting numbers
30. 30. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Basic operations and expressions (Sum or addition) 6 + 9 = 15 six plus nine is equal to ﬁfteen or six plus nine is ﬁfteen . (Diﬀerence or subtraction) 20 − 3 = 17 twenty minus three is seventeen. (Order) 2 < 8 two is less than eight. 12 > 5 Twelve is greater than ﬁve.Alberto Pardo Milan´s e Counting numbers
31. 31. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Basic operations and expressions (Sum or addition) 6 + 9 = 15 six plus nine is equal to ﬁfteen or six plus nine is ﬁfteen . (Diﬀerence or subtraction) 20 − 3 = 17 twenty minus three is seventeen. (Order) 2 < 8 two is less than eight. 12 > 5 Twelve is greater than ﬁve.Alberto Pardo Milan´s e Counting numbers
32. 32. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Basic operations and expressions (Sum or addition) 6 + 9 = 15 six plus nine is equal to ﬁfteen or six plus nine is ﬁfteen . (Diﬀerence or subtraction) 20 − 3 = 17 twenty minus three is seventeen. (Order) 2 < 8 two is less than eight. 12 > 5 Twelve is greater than ﬁve.Alberto Pardo Milan´s e Counting numbers
33. 33. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Basic operations and expressions (Multiplication) 5 · 6 = 30 Five times six equals thirty or ﬁve multiplied by six is thirty. (Division) 40 : 5 = 8 forty divided by ﬁve is equal to eight. Sometimes a division is not exact, so you must write also the remainder. Forty-two divided by ﬁve is eight and two left because 42 = 5 · 8 + 2. (Bracket and square bracket) To make groups we can use brackets ( ) and square brackets [ ].Alberto Pardo Milan´s e Counting numbers
34. 34. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Basic operations and expressions (Multiplication) 5 · 6 = 30 Five times six equals thirty or ﬁve multiplied by six is thirty. (Division) 40 : 5 = 8 forty divided by ﬁve is equal to eight. Sometimes a division is not exact, so you must write also the remainder. Forty-two divided by ﬁve is eight and two left because 42 = 5 · 8 + 2. (Bracket and square bracket) To make groups we can use brackets ( ) and square brackets [ ].Alberto Pardo Milan´s e Counting numbers
35. 35. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Basic operations and expressions (Multiplication) 5 · 6 = 30 Five times six equals thirty or ﬁve multiplied by six is thirty. (Division) 40 : 5 = 8 forty divided by ﬁve is equal to eight. Sometimes a division is not exact, so you must write also the remainder. Forty-two divided by ﬁve is eight and two left because 42 = 5 · 8 + 2. (Bracket and square bracket) To make groups we can use brackets ( ) and square brackets [ ].Alberto Pardo Milan´s e Counting numbers
36. 36. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises PowersAlberto Pardo Milan´s e Counting numbers
37. 37. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Powers Powers of numbers are made by repeated multiplication: a number multiplied by itself several times. A power is made of two parts: the base is the number being multiplied, the index is the number of times you multiply. Example: 34 = 3 · 3 · 3 · 3 = 81, 3 is the base, 4 is the index or the exponent. Read 34 = 81 three to the fourth power is eighty-one or three to the power four is eighty-one. When you square a number, you multiply it by itself. Example: Read 52 = 25 ﬁve squared is twenty-ﬁve or the square of ﬁve is twenty-ﬁve. When you cube a number, you multiply it by itself three times. Example: Read 53 = 125 ﬁve cubed is a hundred and twenty-ﬁve or the cube of ﬁve is a hundred and twenty-ﬁve.Alberto Pardo Milan´s e Counting numbers
38. 38. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Powers Powers of numbers are made by repeated multiplication: a number multiplied by itself several times. A power is made of two parts: the base is the number being multiplied, the index is the number of times you multiply. Example: 34 = 3 · 3 · 3 · 3 = 81, 3 is the base, 4 is the index or the exponent. Read 34 = 81 three to the fourth power is eighty-one or three to the power four is eighty-one. When you square a number, you multiply it by itself. Example: Read 52 = 25 ﬁve squared is twenty-ﬁve or the square of ﬁve is twenty-ﬁve. When you cube a number, you multiply it by itself three times. Example: Read 53 = 125 ﬁve cubed is a hundred and twenty-ﬁve or the cube of ﬁve is a hundred and twenty-ﬁve.Alberto Pardo Milan´s e Counting numbers
39. 39. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Order of OperationsAlberto Pardo Milan´s e Counting numbers
40. 40. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Order of Operations • Simplify the expressions inside grouping symbols, like brackets, square brackets, .... √ 7 + (3 + 2)2 − 16 · 3 : 2 • Find the value of all powers and roots. √ 7 + 52 − 16 · 3 : 2 • Multiply and divide in order from left to right. 7 + 25 − 4 · 3 : 2 • Add and subtract in order from left to right. 7 + 25 − 6 26Alberto Pardo Milan´s e Counting numbers
41. 41. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Order of Operations • Simplify the expressions inside grouping symbols, like brackets, square brackets, .... √ 7 + (3 + 2)2 − 16 · 3 : 2 • Find the value of all powers and roots. √ 7 + 52 − 16 · 3 : 2 • Multiply and divide in order from left to right. 7 + 25 − 4 · 3 : 2 • Add and subtract in order from left to right. 7 + 25 − 6 26Alberto Pardo Milan´s e Counting numbers
42. 42. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Order of Operations • Simplify the expressions inside grouping symbols, like brackets, square brackets, .... √ 7 + (3 + 2)2 − 16 · 3 : 2 • Find the value of all powers and roots. √ 7 + 52 − 16 · 3 : 2 • Multiply and divide in order from left to right. 7 + 25 − 4 · 3 : 2 • Add and subtract in order from left to right. 7 + 25 − 6 26Alberto Pardo Milan´s e Counting numbers
43. 43. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Order of Operations • Simplify the expressions inside grouping symbols, like brackets, square brackets, .... √ 7 + (3 + 2)2 − 16 · 3 : 2 • Find the value of all powers and roots. √ 7 + 52 − 16 · 3 : 2 • Multiply and divide in order from left to right. 7 + 25 − 4 · 3 : 2 • Add and subtract in order from left to right. 7 + 25 − 6 26Alberto Pardo Milan´s e Counting numbers
44. 44. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Order of Operations • Simplify the expressions inside grouping symbols, like brackets, square brackets, .... √ 7 + (3 + 2)2 − 16 · 3 : 2 • Find the value of all powers and roots. √ 7 + 52 − 16 · 3 : 2 • Multiply and divide in order from left to right. 7 + 25 − 4 · 3 : 2 • Add and subtract in order from left to right. 7 + 25 − 6 26Alberto Pardo Milan´s e Counting numbers
45. 45. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises ExercisesAlberto Pardo Milan´s e Counting numbers
46. 46. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 1 Write the correct number: Forty-eight: One hundred and two: Two hundred and seventy-three: Three thousand, nine hundred and eleven: One hundred and two thousand, eight hundred and ten: Two million, twenty thousand, ﬁve hundred and four:Alberto Pardo Milan´s e Counting numbers
47. 47. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 1 Write the correct number: Forty-eight: 48 One hundred and two: 102 Two hundred and seventy-three: 273 Three thousand, nine hundred and eleven: 3, 911 One hundred and two thousand, eight hundred and ten: 102, 810 Two million, twenty thousand, ﬁve hundred and four:2, 020, 504Alberto Pardo Milan´s e Counting numbers
48. 48. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 1 Write the correct number: Forty-eight: 48 One hundred and two: 102 Two hundred and seventy-three: 273 Three thousand, nine hundred and eleven: 3, 911 One hundred and two thousand, eight hundred and ten: 102, 810 Two million, twenty thousand, ﬁve hundred and four:2, 020, 504Alberto Pardo Milan´s e Counting numbers
49. 49. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 1 Write the correct number: Forty-eight: 48 One hundred and two: 102 Two hundred and seventy-three: 273 Three thousand, nine hundred and eleven: 3, 911 One hundred and two thousand, eight hundred and ten: 102, 810 Two million, twenty thousand, ﬁve hundred and four:2, 020, 504Alberto Pardo Milan´s e Counting numbers
50. 50. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 1 Write the correct number: Forty-eight: 48 One hundred and two: 102 Two hundred and seventy-three: 273 Three thousand, nine hundred and eleven: 3, 911 One hundred and two thousand, eight hundred and ten: 102, 810 Two million, twenty thousand, ﬁve hundred and four:2, 020, 504Alberto Pardo Milan´s e Counting numbers
51. 51. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 1 Write the correct number: Forty-eight: 48 One hundred and two: 102 Two hundred and seventy-three: 273 Three thousand, nine hundred and eleven: 3, 911 One hundred and two thousand, eight hundred and ten: 102, 810 Two million, twenty thousand, ﬁve hundred and four:2, 020, 504Alberto Pardo Milan´s e Counting numbers
52. 52. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 1 Write the correct number: Forty-eight: 48 One hundred and two: 102 Two hundred and seventy-three: 273 Three thousand, nine hundred and eleven: 3, 911 One hundred and two thousand, eight hundred and ten: 102, 810 Two million, twenty thousand, ﬁve hundred and four:2, 020, 504Alberto Pardo Milan´s e Counting numbers
53. 53. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 2 How can we read these numbers? 63 245 504 1,617 3,024 10,981 123,450 3,413,012Alberto Pardo Milan´s e Counting numbers
54. 54. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 2 How can we read these numbers? 63 sixty-three 245 two hundred and forty-ﬁve 504 ﬁve hundred and four 1,617 One thousand, six hundred and seventeen 3,024 Three thousand and twenty-four 10,981 Ten thousand, nine hundred and eighty-one 123,450 One hundred and twenty-three thousand, four hundred and ﬁfty 3,413,012 Three million, four hundred and thirteen thousand and twelveAlberto Pardo Milan´s e Counting numbers
55. 55. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 2 How can we read these numbers? 63 sixty-three 245 two hundred and forty-ﬁve 504 ﬁve hundred and four 1,617 One thousand, six hundred and seventeen 3,024 Three thousand and twenty-four 10,981 Ten thousand, nine hundred and eighty-one 123,450 One hundred and twenty-three thousand, four hundred and ﬁfty 3,413,012 Three million, four hundred and thirteen thousand and twelveAlberto Pardo Milan´s e Counting numbers
56. 56. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 2 How can we read these numbers? 63 sixty-three 245 two hundred and forty-ﬁve 504 ﬁve hundred and four 1,617 One thousand, six hundred and seventeen 3,024 Three thousand and twenty-four 10,981 Ten thousand, nine hundred and eighty-one 123,450 One hundred and twenty-three thousand, four hundred and ﬁfty 3,413,012 Three million, four hundred and thirteen thousand and twelveAlberto Pardo Milan´s e Counting numbers
57. 57. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 2 How can we read these numbers? 63 sixty-three 245 two hundred and forty-ﬁve 504 ﬁve hundred and four 1,617 One thousand, six hundred and seventeen 3,024 Three thousand and twenty-four 10,981 Ten thousand, nine hundred and eighty-one 123,450 One hundred and twenty-three thousand, four hundred and ﬁfty 3,413,012 Three million, four hundred and thirteen thousand and twelveAlberto Pardo Milan´s e Counting numbers
58. 58. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 2 How can we read these numbers? 63 sixty-three 245 two hundred and forty-ﬁve 504 ﬁve hundred and four 1,617 One thousand, six hundred and seventeen 3,024 Three thousand and twenty-four 10,981 Ten thousand, nine hundred and eighty-one 123,450 One hundred and twenty-three thousand, four hundred and ﬁfty 3,413,012 Three million, four hundred and thirteen thousand and twelveAlberto Pardo Milan´s e Counting numbers
59. 59. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 2 How can we read these numbers? 63 sixty-three 245 two hundred and forty-ﬁve 504 ﬁve hundred and four 1,617 One thousand, six hundred and seventeen 3,024 Three thousand and twenty-four 10,981 Ten thousand, nine hundred and eighty-one 123,450 One hundred and twenty-three thousand, four hundred and ﬁfty 3,413,012 Three million, four hundred and thirteen thousand and twelveAlberto Pardo Milan´s e Counting numbers
60. 60. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 2 How can we read these numbers? 63 sixty-three 245 two hundred and forty-ﬁve 504 ﬁve hundred and four 1,617 One thousand, six hundred and seventeen 3,024 Three thousand and twenty-four 10,981 Ten thousand, nine hundred and eighty-one 123,450 One hundred and twenty-three thousand, four hundred and ﬁfty 3,413,012 Three million, four hundred and thirteen thousand and twelveAlberto Pardo Milan´s e Counting numbers
61. 61. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 2 How can we read these numbers? 63 sixty-three 245 two hundred and forty-ﬁve 504 ﬁve hundred and four 1,617 One thousand, six hundred and seventeen 3,024 Three thousand and twenty-four 10,981 Ten thousand, nine hundred and eighty-one 123,450 One hundred and twenty-three thousand, four hundred and ﬁfty 3,413,012 Three million, four hundred and thirteen thousand and twelveAlberto Pardo Milan´s e Counting numbers
62. 62. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 3 Evaluate these arithmetic expressions and write down how we read the answer: 3·4+5·2= 13 + 5 · 10 = 18 : 3 + 28 : 7 = 9 · 8 − 54 : 6 = 20 · 9 − 11 · 7 + 81 : 9 =Alberto Pardo Milan´s e Counting numbers
63. 63. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 3 Evaluate these arithmetic expressions and write down how we read the answer: 3 · 4 + 5 · 2 = 22, twenty-two 13 + 5 · 10 =63, sixty-three 18 : 3 + 28 : 7 =10, ten 9 · 8 − 54 : 6 =63, sixty-three 20 · 9 − 11 · 7 + 81 : 9 =112, one hundred and twelveAlberto Pardo Milan´s e Counting numbers
64. 64. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 3 Evaluate these arithmetic expressions and write down how we read the answer: 3 · 4 + 5 · 2 = 22, twenty-two 13 + 5 · 10 =63, sixty-three 18 : 3 + 28 : 7 =10, ten 9 · 8 − 54 : 6 =63, sixty-three 20 · 9 − 11 · 7 + 81 : 9 =112, one hundred and twelveAlberto Pardo Milan´s e Counting numbers
65. 65. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 3 Evaluate these arithmetic expressions and write down how we read the answer: 3 · 4 + 5 · 2 = 22, twenty-two 13 + 5 · 10 =63, sixty-three 18 : 3 + 28 : 7 =10, ten 9 · 8 − 54 : 6 =63, sixty-three 20 · 9 − 11 · 7 + 81 : 9 =112, one hundred and twelveAlberto Pardo Milan´s e Counting numbers
66. 66. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 3 Evaluate these arithmetic expressions and write down how we read the answer: 3 · 4 + 5 · 2 = 22, twenty-two 13 + 5 · 10 =63, sixty-three 18 : 3 + 28 : 7 =10, ten 9 · 8 − 54 : 6 =63, sixty-three 20 · 9 − 11 · 7 + 81 : 9 =112, one hundred and twelveAlberto Pardo Milan´s e Counting numbers
67. 67. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 3 Evaluate these arithmetic expressions and write down how we read the answer: 3 · 4 + 5 · 2 = 22, twenty-two 13 + 5 · 10 =63, sixty-three 18 : 3 + 28 : 7 =10, ten 9 · 8 − 54 : 6 =63, sixty-three 20 · 9 − 11 · 7 + 81 : 9 =112, one hundred and twelveAlberto Pardo Milan´s e Counting numbers
68. 68. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 4 Put these numbers in order from least to greatest: 53025, 45422, 33452, 25242, 33542, 25232.Alberto Pardo Milan´s e Counting numbers
69. 69. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 4 Put these numbers in order from least to greatest: 53025, 45422, 33452, 25242, 33542, 25232. 25232 < 25242 < 33452 < 33542 < 45422 < 53025Alberto Pardo Milan´s e Counting numbers
70. 70. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 5 Do the sums and ﬁll in the blank the right symbol (greater than or less than): 12 + 54 34 + 23: 54 + 23 49 + 25 : 12 + 7 7 + 13 : (34 + 40) + 3 16 + 60 : 13 + 12 22 + 4 : 52 + 17 28 + 45 :Alberto Pardo Milan´s e Counting numbers
71. 71. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 5 Do the sums and ﬁll in the blank the right symbol (greater than or less than): 12 + 54 > 34 + 23: 12 + 54 = 66, 34 + 23 = 57, 66 > 57 54 + 23 > 49 + 25 :54 + 23 = 77, 49 + 25 = 74, 77 > 74 12 + 7 < 7 + 13 :12 + 7 = 19, 7 + 13 = 20, 19 < 20 (34 + 40) + 3 > 16 + 60 :(34 + 40) + 3 = 77, 16 + 60 = 76, 77 > 76 13 + 12 < 22 + 4 :13 + 12 = 25, 22 + 4 = 26, 25 < 26 52 + 17 < 28 + 45 :52 + 17 = 69, 28 + 45 = 73, 69 < 73Alberto Pardo Milan´s e Counting numbers
72. 72. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 5 Do the sums and ﬁll in the blank the right symbol (greater than or less than): 12 + 54 > 34 + 23: 12 + 54 = 66, 34 + 23 = 57, 66 > 57 54 + 23 > 49 + 25 :54 + 23 = 77, 49 + 25 = 74, 77 > 74 12 + 7 < 7 + 13 :12 + 7 = 19, 7 + 13 = 20, 19 < 20 (34 + 40) + 3 > 16 + 60 :(34 + 40) + 3 = 77, 16 + 60 = 76, 77 > 76 13 + 12 < 22 + 4 :13 + 12 = 25, 22 + 4 = 26, 25 < 26 52 + 17 < 28 + 45 :52 + 17 = 69, 28 + 45 = 73, 69 < 73Alberto Pardo Milan´s e Counting numbers
73. 73. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 5 Do the sums and ﬁll in the blank the right symbol (greater than or less than): 12 + 54 > 34 + 23: 12 + 54 = 66, 34 + 23 = 57, 66 > 57 54 + 23 > 49 + 25 :54 + 23 = 77, 49 + 25 = 74, 77 > 74 12 + 7 < 7 + 13 :12 + 7 = 19, 7 + 13 = 20, 19 < 20 (34 + 40) + 3 > 16 + 60 :(34 + 40) + 3 = 77, 16 + 60 = 76, 77 > 76 13 + 12 < 22 + 4 :13 + 12 = 25, 22 + 4 = 26, 25 < 26 52 + 17 < 28 + 45 :52 + 17 = 69, 28 + 45 = 73, 69 < 73Alberto Pardo Milan´s e Counting numbers
74. 74. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 5 Do the sums and ﬁll in the blank the right symbol (greater than or less than): 12 + 54 > 34 + 23: 12 + 54 = 66, 34 + 23 = 57, 66 > 57 54 + 23 > 49 + 25 :54 + 23 = 77, 49 + 25 = 74, 77 > 74 12 + 7 < 7 + 13 :12 + 7 = 19, 7 + 13 = 20, 19 < 20 (34 + 40) + 3 > 16 + 60 :(34 + 40) + 3 = 77, 16 + 60 = 76, 77 > 76 13 + 12 < 22 + 4 :13 + 12 = 25, 22 + 4 = 26, 25 < 26 52 + 17 < 28 + 45 :52 + 17 = 69, 28 + 45 = 73, 69 < 73Alberto Pardo Milan´s e Counting numbers
75. 75. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 5 Do the sums and ﬁll in the blank the right symbol (greater than or less than): 12 + 54 > 34 + 23: 12 + 54 = 66, 34 + 23 = 57, 66 > 57 54 + 23 > 49 + 25 :54 + 23 = 77, 49 + 25 = 74, 77 > 74 12 + 7 < 7 + 13 :12 + 7 = 19, 7 + 13 = 20, 19 < 20 (34 + 40) + 3 > 16 + 60 :(34 + 40) + 3 = 77, 16 + 60 = 76, 77 > 76 13 + 12 < 22 + 4 :13 + 12 = 25, 22 + 4 = 26, 25 < 26 52 + 17 < 28 + 45 :52 + 17 = 69, 28 + 45 = 73, 69 < 73Alberto Pardo Milan´s e Counting numbers
76. 76. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 5 Do the sums and ﬁll in the blank the right symbol (greater than or less than): 12 + 54 > 34 + 23: 12 + 54 = 66, 34 + 23 = 57, 66 > 57 54 + 23 > 49 + 25 :54 + 23 = 77, 49 + 25 = 74, 77 > 74 12 + 7 < 7 + 13 :12 + 7 = 19, 7 + 13 = 20, 19 < 20 (34 + 40) + 3 > 16 + 60 :(34 + 40) + 3 = 77, 16 + 60 = 76, 77 > 76 13 + 12 < 22 + 4 :13 + 12 = 25, 22 + 4 = 26, 25 < 26 52 + 17 < 28 + 45 :52 + 17 = 69, 28 + 45 = 73, 69 < 73Alberto Pardo Milan´s e Counting numbers
77. 77. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 6 How can we read the following expressions? 24 < 35: 103 > 99: 32 + 20 = 52: 104 − 31 = 73: 123 · 100 = 12300: 4234 : 2 = 2117:Alberto Pardo Milan´s e Counting numbers
78. 78. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 6 How can we read the following expressions? 24 < 35:twenty-four is less than thirty-ﬁve 103 > 99: one hundred and three is greater than ninety-nine 32 + 20 = 52: thirty-two plus twenty is equal to ﬁfty-two 104 − 31 = 73: one hundred and four minus thirty-one is seventy-three 123 · 100 = 12300: one hundred and twenty-three times one hundred is equal to twelve thousand, three hundred 4234 : 2 = 2117: four thousand, two hundred and thirty-four divided by two is equal to two thousand, one hundred and seventeenAlberto Pardo Milan´s e Counting numbers
79. 79. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 6 How can we read the following expressions? 24 < 35:twenty-four is less than thirty-ﬁve 103 > 99: one hundred and three is greater than ninety-nine 32 + 20 = 52: thirty-two plus twenty is equal to ﬁfty-two 104 − 31 = 73: one hundred and four minus thirty-one is seventy-three 123 · 100 = 12300: one hundred and twenty-three times one hundred is equal to twelve thousand, three hundred 4234 : 2 = 2117: four thousand, two hundred and thirty-four divided by two is equal to two thousand, one hundred and seventeenAlberto Pardo Milan´s e Counting numbers
80. 80. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 6 How can we read the following expressions? 24 < 35:twenty-four is less than thirty-ﬁve 103 > 99: one hundred and three is greater than ninety-nine 32 + 20 = 52: thirty-two plus twenty is equal to ﬁfty-two 104 − 31 = 73: one hundred and four minus thirty-one is seventy-three 123 · 100 = 12300: one hundred and twenty-three times one hundred is equal to twelve thousand, three hundred 4234 : 2 = 2117: four thousand, two hundred and thirty-four divided by two is equal to two thousand, one hundred and seventeenAlberto Pardo Milan´s e Counting numbers
81. 81. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 6 How can we read the following expressions? 24 < 35:twenty-four is less than thirty-ﬁve 103 > 99: one hundred and three is greater than ninety-nine 32 + 20 = 52: thirty-two plus twenty is equal to ﬁfty-two 104 − 31 = 73: one hundred and four minus thirty-one is seventy-three 123 · 100 = 12300: one hundred and twenty-three times one hundred is equal to twelve thousand, three hundred 4234 : 2 = 2117: four thousand, two hundred and thirty-four divided by two is equal to two thousand, one hundred and seventeenAlberto Pardo Milan´s e Counting numbers
82. 82. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 6 How can we read the following expressions? 24 < 35:twenty-four is less than thirty-ﬁve 103 > 99: one hundred and three is greater than ninety-nine 32 + 20 = 52: thirty-two plus twenty is equal to ﬁfty-two 104 − 31 = 73: one hundred and four minus thirty-one is seventy-three 123 · 100 = 12300: one hundred and twenty-three times one hundred is equal to twelve thousand, three hundred 4234 : 2 = 2117: four thousand, two hundred and thirty-four divided by two is equal to two thousand, one hundred and seventeenAlberto Pardo Milan´s e Counting numbers
83. 83. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 6 How can we read the following expressions? 24 < 35:twenty-four is less than thirty-ﬁve 103 > 99: one hundred and three is greater than ninety-nine 32 + 20 = 52: thirty-two plus twenty is equal to ﬁfty-two 104 − 31 = 73: one hundred and four minus thirty-one is seventy-three 123 · 100 = 12300: one hundred and twenty-three times one hundred is equal to twelve thousand, three hundred 4234 : 2 = 2117: four thousand, two hundred and thirty-four divided by two is equal to two thousand, one hundred and seventeenAlberto Pardo Milan´s e Counting numbers
84. 84. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 7 Write how we read the following years: 1977 2001 1492Alberto Pardo Milan´s e Counting numbers
85. 85. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 7 Write how we read the following years: 1977 nineteen seventy-seven 2001 two thousand and one 1492 fourteen ninety-twoAlberto Pardo Milan´s e Counting numbers
86. 86. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 7 Write how we read the following years: 1977 nineteen seventy-seven 2001 two thousand and one 1492 fourteen ninety-twoAlberto Pardo Milan´s e Counting numbers
87. 87. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 7 Write how we read the following years: 1977 nineteen seventy-seven 2001 two thousand and one 1492 fourteen ninety-twoAlberto Pardo Milan´s e Counting numbers
88. 88. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 8 An athlete runs 1200m every day during a week. How many km does he run?Alberto Pardo Milan´s e Counting numbers
89. 89. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 8 An athlete runs 1200m every day during a week. How many km does he run? Data: He runs 1200 m a day. 1200 · 7 = 8400 He runs for a 8400 m = 8, 4 km Answer: He week. runs 8,4 kmAlberto Pardo Milan´s e Counting numbers
90. 90. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 8 An athlete runs 1200m every day during a week. How many km does he run? Data: He runs 1200 m a day. 1200 · 7 = 8400 He runs for a 8400 m = 8, 4 km Answer: He week. runs 8,4 kmAlberto Pardo Milan´s e Counting numbers
91. 91. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 8 An athlete runs 1200m every day during a week. How many km does he run? Data: He runs 1200 m a day. 1200 · 7 = 8400 He runs for a 8400 m = 8, 4 km Answer: He week. runs 8,4 kmAlberto Pardo Milan´s e Counting numbers
92. 92. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 9 Ana has got e13; she wants to buy a toy, but she needs 21 euros more. How much does the toy cost?Alberto Pardo Milan´s e Counting numbers
93. 93. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 9 Ana has got e13; she wants to buy a toy, but she needs 21 euros more. How much does the toy cost? Data: She has got e13. She needs e21 13 + 21 = 34 Answer: The more. toy costs e34Alberto Pardo Milan´s e Counting numbers
94. 94. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 9 Ana has got e13; she wants to buy a toy, but she needs 21 euros more. How much does the toy cost? Data: She has got e13. She needs e21 13 + 21 = 34 Answer: The more. toy costs e34Alberto Pardo Milan´s e Counting numbers
95. 95. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 9 Ana has got e13; she wants to buy a toy, but she needs 21 euros more. How much does the toy cost? Data: She has got e13. She needs e21 13 + 21 = 34 Answer: The more. toy costs e34Alberto Pardo Milan´s e Counting numbers
96. 96. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 10 Jaime has to read a book with 98 pages in a week. How many pages must he read each day?Alberto Pardo Milan´s e Counting numbers
97. 97. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 10 Jaime has to read a book with 98 pages in a week. How many pages must he read each day? Data: He has to read 98 pages. Answer: Jaime He reads for a 98 : 7 = 14 reads 14 pages a week. dayAlberto Pardo Milan´s e Counting numbers
98. 98. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 10 Jaime has to read a book with 98 pages in a week. How many pages must he read each day? Data: He has to read 98 pages. Answer: Jaime He reads for a 98 : 7 = 14 reads 14 pages a week. dayAlberto Pardo Milan´s e Counting numbers
99. 99. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 10 Jaime has to read a book with 98 pages in a week. How many pages must he read each day? Data: He has to read 98 pages. Answer: Jaime He reads for a 98 : 7 = 14 reads 14 pages a week. dayAlberto Pardo Milan´s e Counting numbers
100. 100. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 11 Luis gets e6 every week and he spends 4 euros. How many weeks does he need to save 18 euros to buy a book?Alberto Pardo Milan´s e Counting numbers
101. 101. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 11 Luis gets e6 every week and he spends 4 euros. How many weeks does he need to save 18 euros to buy a book? Data: He gets e6 a week. He spends e4 a week. 6−4=2 Answer: Luis He needs to save 18 : 2 = 9 needs 9 e18. weeksAlberto Pardo Milan´s e Counting numbers
102. 102. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 11 Luis gets e6 every week and he spends 4 euros. How many weeks does he need to save 18 euros to buy a book? Data: He gets e6 a week. He spends e4 a week. 6−4=2 Answer: Luis He needs to save 18 : 2 = 9 needs 9 e18. weeksAlberto Pardo Milan´s e Counting numbers
103. 103. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 11 Luis gets e6 every week and he spends 4 euros. How many weeks does he need to save 18 euros to buy a book? Data: He gets e6 a week. He spends e4 a week. 6−4=2 Answer: Luis He needs to save 18 : 2 = 9 needs 9 e18. weeksAlberto Pardo Milan´s e Counting numbers
104. 104. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 12 A grandfather has e743 and three grandsons. He wants to give the same amount of money to each boy. How much does each boy get? Is there any money left?Alberto Pardo Milan´s e Counting numbers
105. 105. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 12 A grandfather has e743 and three grandsons. He wants to give the same amount of money to each boy. How much does each boy get? Is there any money left? Data: Answer: He has e743. Divide Each boy He has 3 743 = 247 · 3 + 2 gets e247 grandsons. and e2 leftAlberto Pardo Milan´s e Counting numbers
106. 106. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 12 A grandfather has e743 and three grandsons. He wants to give the same amount of money to each boy. How much does each boy get? Is there any money left? Data: Answer: He has e743. Divide Each boy He has 3 743 = 247 · 3 + 2 gets e247 grandsons. and e2 leftAlberto Pardo Milan´s e Counting numbers
107. 107. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 12 A grandfather has e743 and three grandsons. He wants to give the same amount of money to each boy. How much does each boy get? Is there any money left? Data: Answer: He has e743. Divide Each boy He has 3 743 = 247 · 3 + 2 gets e247 grandsons. and e2 leftAlberto Pardo Milan´s e Counting numbers
108. 108. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 13 Alfred has 55 Australian square coins. He wants to stick coins to get a big square. How many coins can he use to do it? How many coins left?Alberto Pardo Milan´s e Counting numbers
109. 109. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 13 Alfred has 55 Australian square coins. He wants to stick coins to get a big square. How many coins can he use to do it? How many coins left? Data: He has 55 coins. 72 = 49, 82 = 64 Answer: He can do a big 55 − 49 = 6 square with 49 coins and 6 coins leftAlberto Pardo Milan´s e Counting numbers
110. 110. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 13 Alfred has 55 Australian square coins. He wants to stick coins to get a big square. How many coins can he use to do it? How many coins left? Data: He has 55 coins. 72 = 49, 82 = 64 Answer: He can do a big 55 − 49 = 6 square with 49 coins and 6 coins leftAlberto Pardo Milan´s e Counting numbers
111. 111. Indice Numbers Ordinal numbers Operations Powers Order of Operations Exercises Exercises Exercise 13 Alfred has 55 Australian square coins. He wants to stick coins to get a big square. How many coins can he use to do it? How many coins left? Data: He has 55 coins. 72 = 49, 82 = 64 Answer: He can do a big 55 − 49 = 6 square with 49 coins and 6 coins leftAlberto Pardo Milan´s e Counting numbers