Basic math (addition)

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Basic math (addition)

  1. 1. Basic Math Counting and Addition By iTutor.com T- 1-855-694-8886 Email- info@iTutor.com
  2. 2. CountingOne 1Two 2Three 3Four 4Five 5 © iTutor. 2000-2013. All Rights Reserved
  3. 3. Six 6Seven 7Eight 8Nine 9Ten 10 © iTutor. 2000-2013. All Rights Reserved
  4. 4. AdditionAddition is .. ... bringing two or more numbers (or things) together to make a new total Here 1 ball is added to 1 ball to make 2 balls: "One plus one And in words it is: equals two" 3+2=5 © iTutor. 2000-2013. All Rights Reserved
  5. 5. WHOLE NUMBERS Addition Number Line • Number Line - Shows numerals in order of value Adding on the Number Line • Adding on the Number Line (2 + 3 = 5) Adding with pictures • Adding with pictures © iTutor. 2000-2013. All Rights Reserved
  6. 6. Addition of whole numbersSet ModelTo find “2 + 3”, one with 2 objects and the other with 3objects, form their union, and count the total. (click tosee animation) © iTutor. 2000-2013. All Rights Reserved
  7. 7. Measurement ModelIn this model, the addition is performed on a number line.For example, to calculate 3 + 4,(1) draw an arrow with length 3 starting at 0.(2) draw an arrow with length 4 starting from the endof the previous arrow.(3) the sum is then the length of the two arrowscombined together this way.0 1 2 3 4 5 6 7 8 9 © iTutor. 2000-2013. All Rights Reserved
  8. 8. Count From A Number Upwards Example: 6 + 3 Think "6 ... 7, 8, 9"Jump Strategy You can also count by 2s or 10s, or make any "jumps" you want to help you to solve a calculation. Example: 4 + 12 Think "4 ... 14, 15, 16" © iTutor. 2000-2013. All Rights Reserved
  9. 9. Alternative number line model foradditionIn this model, a bunny is sitting above the number 0(which is its home base) facing right (which is the positivedirection), and will jump forward if it has to perform anaddition problem.0 1 2 3 4 5 6 7 © iTutor. 2000-2013. All Rights Reserved
  10. 10. Example : 2 + 41. Our rabbit starts at 0 facing right.2. It then hops forward 2 units because it sees 2 in the beginning.0 1 2 3 4 5 6 7 © iTutor. 2000-2013. All Rights Reserved
  11. 11. Example : 2 + 41. Our rabbit starts at 0 facing right.2. It then hops forward 2 units because it sees 2 in the beginning.0 1 2 3 4 5 6 7 © iTutor. 2000-2013. All Rights Reserved
  12. 12. Example : 2 + 41. Our rabbit starts at 0 facing right.2. It then hops forward 2 units because it sees 2 in the beginning.0 1 2 3 4 5 6 7 © iTutor. 2000-2013. All Rights Reserved
  13. 13. Example : 2 + 41. Our rabbit starts at 0 facing right.2. It then hops forward 2 units because it sees 2 in the beginning.3. After this the bunny has to jump 4 more steps forward because it sees +40 1 2 3 4 5 6 7 © iTutor. 2000-2013. All Rights Reserved
  14. 14. Example : 2 + 41. Our rabbit starts at 0 facing right.2. It then hops forward 2 units because it sees 2 in the beginning.3. After this the bunny has to jump 4 more steps forward because it sees + 4.0 1 2 3 4 5 6 7 © iTutor. 2000-2013. All Rights Reserved
  15. 15. Example : 2 + 41. Our rabbit starts at 0 facing right.2. It then hops forward 2 units because it sees 2 in the beginning.3. After this the bunny has to jump 4 more steps forward because it sees + 4. Since the bunny finally stops at 6, we know that 2 + 4 = 6.0 1 2 3 4 5 6 7 © iTutor. 2000-2013. All Rights Reserved
  16. 16. NamesOther names for Addition are : Sum Plus Increase TotalAnd the numbers to be added together are called the"Addends": © iTutor. 2000-2013. All Rights Reserved
  17. 17. Adding numbers with two digits Adding numbers with 1 digit is pretty straight forward. In general, you can do it mentally or use your fingers. Adding zero to a number never changes the number.For Addition Step 1: Add the one’s place number and take the carry to the next step. Step 2: Add the ten’s place number and also add the carry and over the new carry to the next step. Continue this process for every place in the given number. © iTutor. 2000-2013. All Rights Reserved
  18. 18. Handy rules for Addition: a) Add the rightmost column. If this column contains only one digit, we just write that digit under the column we are adding. b) We need to go on to the next column and repeat the same procedure.In the above, we add the ones column first. Then, we carry over the tens to the tenscolumn. The 1 that we carry over has a place value of 10. However, there is no need towrite 10 because as we saw before in place value putting a 1 here in the tens placemeans that there is 1 ten. © iTutor. 2000-2013. All Rights Reserved
  19. 19. A man sold 230 balloons at a carnival inthe morning. He sold another 86balloons in the evening.a) How many balloons did he sell in all? Morning Afternoon 230 86 ? © iTutor. 2000-2013. All Rights Reserved
  20. 20. A man sold 230 balloons at a carnival in the morning. He soldanother 86 balloons in the evening. How many did he sell in all? Hundreds Tens Ones 3 1 6 © iTutor. 2000-2013. All Rights Reserved
  21. 21. Addition (count) Adding in columns • Adding in columns - Uses no equal sign 5 897 +5 + 368 Answer is called “sum”. 10 1265 Simple Complex © iTutor. 2000-2013. All Rights Reserved
  22. 22. www.itutor.com The End

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