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Adding and subtracting decimals

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The question

13.49 − 13.17

13.49 13.17 0.32
  1. 13.49 − 13.17. Line up the decimal points, not the right-hand ends.
  2. 9 take away 7 leaves 2.
  3. 4 take away 1 leaves 3.
  4. 3 take away 3 leaves 0.
  5. 1 take away 1 leaves nothing — and a nothing at the front is not written, so the answer starts one place along.
  6. The point in the answer comes straight down. 13.49 − 13.17 = 0.32.

How it works.

  1. 01

    13.49 − 13.17. Line up the decimal points, not the right-hand ends.

  2. 02

    9 take away 7 leaves 2.

  3. 03

    4 take away 1 leaves 3.

  4. 04

    3 take away 3 leaves 0.

  5. 05

    1 take away 1 leaves nothing — and a nothing at the front is not written, so the answer starts one place along.

  6. 06

    The point in the answer comes straight down. 13.49 − 13.17 = 0.32.

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