Adding and Subtracting

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Presentation transcript:

Adding and Subtracting Decimals

To find the sum, rewrite numbers so that the place values line up vertically. 213 + 4.2 + 0.635 + 13.54 213 . 4.2 0.635 13.54 1 1 . 000 00 + 2 3 1 . 3 7 5 If the decimal is out of sight, then the decimal is at the right. Add zeros (place holders) behind the decimal as needed.

To find the Difference, rewrite numbers so that the place values line up vertically. 4.3 4.3 -- 0.168 0.168 . 9 2 10 10 00 - 4 . 1 3 2 Add zeros (place holders) behind the decimal as needed. You will need to borrow and regroup if the top Digit is smaller than the bottom digit.

3.082 + 16.4 + 6.42 2. 5.62 – 1.8 0.54 + 2.8 + 24 + 3.017 4. 17 – 1.834 5. 17.93 – 8