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### Basic math akash

• 1.
• 2. Project :- Basic Mathematics To:- Ms. Kavita Gokhale From :- Name Roll no . Manish tripathi 37 Suhas vanve 38 Akash varaiya 39 Chirag vasani 40 Vijitha das 41 Dipesh waghe 42
• 3.
• 4.
• 5. FOUR QUARTERS -+=- --=+ ++=+ +-=-
• 6. Sign rules  Adding Sign rules Positive + Positive = Positive eg: 5 + 4 = 9 Negative + Negative = Negative eg: (- 7) + (- 2) = - 9 Sum of a negative and a positive number: Use the sign of the larger number and subtract eg: (- 7) + 4 = -3 6 + (-9) = - 3 (- 3) + 7 = 4 5 + ( -3) = 2
• 7.  Subtracting Rules: Negative - Positive = Negative eg: (- 5) - 3 = -5 + (-3) = -8 Positive - Negative = Positive + Positive = Positive eg: 5 - (-3) = 5 + 3 = 8 Negative - Negative = Negative + Positive = Use the sign of the larger number and subtract (Change double negatives to a positive) eg:(-5) - (-3) = ( -5) + 3 = -2 (-3) - ( -5) = (-3) + 5 = 2
• 8. Integers Numbers Positive Numbers • +1, +2, +3,+4. every number which is greater than 1 is called positive numbers.
• 9. Negative Number • -1, -2, -3, -4 every number which is less than 1 is called negative numbers
• 10. Writing integers Example Written as Read as 1) (+55) + (-30) 55+ (-30) Fifty –five plus negative thirty 2) (+49) + (+14) 49+(14) Forty-nine plus Or 49+14 fourteen 3)(-27) + (-127) (-27) +(-127) Negative twenty-seven plus negative hundred and twenty-seven
• 11. Multiplication and division of integers • Ex. (1) (-14) X (-5) The magnitudes of -14 and -5 are 14 and 5 respectively Their product, 14X5 = 70 (-14) X(-5)=70 The product of two negative numbers is positive.
• 12. Carry out the following multiplications: • 12X(-3) • (-6) X4 • (-15)X(-5) • 35X8 • (-38)X(-2) • 15X(-61)
• 13. Carry out the following Divisions: • (-15) / (-5) • (-38/ (-2) • 90/6 • (-90)/(-6)
• 14. PerCENTAGE  You may have come across with news items like the Newspaper , Radio or T.V.  We use the word percent often in everyday affairs For ex. 1)There has been 15per increase in food grain production. 2)The cost of petrol has rises by 5percent.  Let us find out the meaning of these words and learn how they are used.
• 15. Definition • Percent can be defined as “of one hundred.” of 100
• 16. Definition • “Cent” comes from the Latin and means 100.
• 17. Convert percent to number : multiply by 100 1. 25%= 25 = 1 100 4
• 18. Comparing Money & Percents • RS 0.50 is ½ of a rupee • 50% also means ½
• 19. 20 % Means 20 parts out of 100 or 20 hundredths. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100
• 20. Given: • Cost price=Rs 60 • discount=25% • Amount of discount =25% of (60) = 25 x 60 100 Ans =15.Rs Price After Discount:- =Cost price –discount amount =60 – 15 =Rs 45.Rs Total cost of shoes is 45 Rs.
• 21. • Given: • cost price= Rs 30 • Tax=7% • Amount of tax=7% of (30) = 7 x 30 100 Ans =2.10 Rs. Price after discount=cost price-discount amt =30 + 2.10 Ans=32.10 Rs. Total cost of shirt is 32.10 Rs.
• 22. DECIMAL FRACTION INTO PERCENTAGE  Convert the following decimal fraction into percentage.  Examples :- 1) 0.52 = 52/100 = 52% 2) 0.060 = 6/100 = 6% 3) 0.4 = 0.40 = 40/100 = 40% 4) 1.0 = 1.00 = 100/100 = 100%
• 23. PERCENTAGE OF A GIVEN NUMBER Convert the following fraction into percentage. Find out a given percentage of a given numbers. Example :- 1)50% of 70 means 70x50/100 = 35 2)3% of 25000 mean 25000x3/100 = 750 3) There are 40 percent girls in a certain school . If the number of children in the school is 950, what is the number of girls in the school. 40% of 950 = 950x40/100 = 380 Ans - Number of girls is 380
• 24. FIND PERCENTAGE Find out what percentage of a given number forms of another number. 24,50 24/50= 24x2/50x2 = 48/100 = 48% 2) 222 , 300 222/300 = 222÷3/300÷3 = 74/100 = 74%
• 25.
• 26. E.g. : = 25 x [ 113 – 9 + 2 x 13 ] = 25 x [ 113 – 9 + 26 ] = 25 x [ 104 + 26 ] = 25 x 130 = 3250 Solve the following ? 1. (130 + 91) x ( 2 + 8 ) = ? Ans. 2210 2. 103 + 91 x 2 + 8 = ? Ans. 293
• 27. The End Bibliography : Mathematics Text book (Standard Six ) www.wikipedia.co.in www.slideshare.com http://cgl.microsoft.com/ clipgallerylive/default.asp
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