#### • Class 11 Physics Demo

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# definition of adding and subtracting decimals

Answers:Adding and subtracting decimals is no different than adding or subtracting whole numbers. Just line up the decimal points first. You can pad the end with extra zeroes to make them the same length. For example: 37.25 + 3.8 37.25 +3.80 --------- 41.05

Question:Jackie is shopping for a winter coat. She sees a coat she likes on sale for $49.49. The regular price is$78.95. a. Explain how she would estimate the difference between the two prices. b. Use a pencil-and-paper method to calculate this difference.

Answers:a. She would round $49.49 to$50; and $78.95 to$80. Then, subtract 50 from 80. b. 80 -50 \$30

Question:4.3 + 1.79 + 11 equals... 42.61 - 3.095 equals...

Answers:4.3 + 1.79 + 11=17.09 42.61 - 3.095=39.515

Question:Question1:Find the difference of the decimals. 32.2 - 5.3 = A:26.1 B:33.1 C:37.5 D:26.9 Question2:Find the difference of the decimals. 28.9 - 15.4 = A:13.5 B:3.5 C:12.5 D:13.4 Question3:Find the difference of the decimals. 0.389 - 0.15 = A:0.0239 B: 0.229 C:0.239 D:0.374 Question4:Find the difference of the decimals. 8.20 - 4.07 = A: 3.5 B:4.13 C:4.05 D:4:15 Question5:Find the difference of the decimals. 203.105 - 191.07 = A:12.035 B:12.098 C:12.135 D:192.175 Question6:Find the sum of the decimals. 0.4 + 3.1 = A:7.1 B:3.5 C:30.5 D:4.5 Question7:Find the sum of the decimals. 0.04 + 4.7 = A: 4.74 B: 4.11 C: 5.74 D:4.84 Question8:Find the sum of the decimals. 26.182 + 73.818 = A:999.990 B:999.999 C:1,000.000 D:100.000 Question9: Find the sum of the decimals. 3.2 + .09 = A:3.11 B: 4.1 C: 3.29 D:3.09 Question10:Find the sum of the decimals. 68.09 + 37.46 = A: 105.55 B:95.515 C:95.55 D: 104.55

Answers:Get a calculator and do the problems yourself! ;)