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# Adding and Subtracting Decimals - PowerPoint PPT Presentation

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

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NS 1.0 Solve problems involving addition and subtraction of 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.

0.64 + 0.39

Line up the decimal points.

0.64

+ 0.39

__________________________

0.64

+ 0.39

__________________________

1.03

5.74 + 3.3

Line up the decimal points.

5.74

+ 3.3

_____________________________

5.74

+ 3.3

_____________________________

9.04

• 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.

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