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Activity 57
Evaluate each of the following and give an example from everyday life to illustrate the sum (e.g. Thomas’s piggy bank).
(a) 4 − −2
(b) −3 − −5
Answer
(a) 4 − −2 = 4 + 2 = 6. .
A gift of £4 plus taking away a £2 debt is equivalent to a gift of £6.
(b) −3 − −5 = −3 + 5 = 2.
Acquiring a debt of £3 and taking away a debt of £5 results in being £2 better off.