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Adding and Subtracting Decimals

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  • Do zeros need to be annexed to solve this problem? 10 + 3.28
    Yes, annex zeros to 10.00 so it goes to the hundredths place.
  • Add: 5.9 + 2.7
    8.6
  • Do zeros need to be annexed to solve this problem? 0.46 - 0.3
    Yes, annex zeros to 0.30 so it ends in the hundredths place.
  • What do you have to do before adding or subtracting decimals?
    Line up the decimal points.
  • Subtract: 4.01 - 2.95
    1.06
  • Subtract: 15 - 6.01
    8.99
  • Describe the process of regrouping in a subtraction problem.
    Take one away from the column on the left and add ten to the column on the right.
  • Subtract: 13.64 - 8.3
    5.34
  • Do zeros need to be annexed to solve this problem? 9.92 + 56 + 3.08
    Yes, annex zeros to 56.00 so all numbers end in the hundredths place.
  • Do zeros need to be annexed to solve this problem? 13.45 - 1.64
    No, both numbers end in the hundredths place.
  • Add: 2.57 + 7.7
    10.27
  • Add: 8.92 + 56 + 3.08
    68 or 68.0 or 68.00
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