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Grade 7 maths · M.12 · Operations with fractions and decimals

Subtract decimals including negatives

Line up the decimal points to add or subtract. The sign rules are the same as for integers.

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See worked examples
  1. Evaluate: −8.8 − (−2.4)

    Answer: -6.4

  2. Evaluate: −7.6 − 8.2

    Answer: -15.8

  3. Evaluate: 0.5 − 8.3

    Answer: -7.8

Tip: Line up the decimal points to add or subtract. The sign rules are the same as for integers.

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