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Adding and Subtracting Decimals NS 1.0 Solve problems involving addition and subtraction of decimals.
To add decimals Line up the decimal points and add the columns from right to left. Place a decimal point in the answer directly below the other decimal points.
Example 1 0.64 + 0.39 Line up the decimal points. 0.64 +0.39 __________________________ Add the columns. 0.64 +0.39 __________________________ 1.03
Example 2 5.74 + 3.3 Line up the decimal points. 5.74 + 3.3 _____________________________ Add the columns. 5.74 + 3.3 _____________________________ 9.04
To subtract decimals Line up the decimal points. Subtract the columns from right to left, regrouping if necessary. Place a decimal point in the answer directly below the other decimal points.
Example 1 0.86 – 0.49 Line up the decimal points 0.86 - 0.49 __________________________ Regroup the tenths. Subtract the columns. 0.86 - 0.49 __________________________ 16 7 0.37
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