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Year 8 maths · J.9 · Add and subtract integers

Subtract to find the change between integers

Find how far apart the two values are on a number line.

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See worked examples
  1. The temperature was 6°C in the morning and −7°C in the afternoon. By how many degrees did it change? Write the size of the change.

    Answer: 13

  2. The temperature was −10°C in the morning and −9°C in the afternoon. By how many degrees did it change? Write the size of the change.

    Answer: 1

  3. The temperature was 4°C in the morning and 3°C in the afternoon. By how many degrees did it change? Write the size of the change.

    Answer: 1

Tip: Find how far apart the two values are on a number line.

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