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Adding and Subtracting Decimals
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Subtract: 13.64 - 8.3
5.34
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.
What do you have to do before adding or subtracting decimals?
Line up the decimal points.
Add: 8.92 + 56 + 3.08
68 or 68.0 or 68.00
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? 0.46 - 0.3
Yes, annex zeros to 0.30 so it ends 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.
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.
Subtract: 15 - 6.01
8.99
Add: 2.57 + 7.7
10.27
Subtract: 4.01 - 2.95
1.06
Add: 5.9 + 2.7
8.6
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