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Year 8 maths · J.3 · Add and subtract integers

Add integers: all sign combinations

Use the number line, or think about the signs: same signs add and keep the sign, different signs subtract.

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  1. Evaluate: 5 + (−12)

    Answer: -7

  2. Evaluate: 10 + 3

    Answer: 13

  3. Evaluate: 10 + 7

    Answer: 17

Tip: Use the number line, or think about the signs: same signs add and keep the sign, different signs subtract.

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