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Question

Evaluate the following:

(i) −8 − 24 + 31 − 26 − 28 + 7 + 19 − 18 − 8 + 33
(ii) −26 −20 + 33 − (−33) + 21 + 24 − (−25) −26 − 14 − 34

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Solution

(i) −8 − 24 + 31 − 26 − 28 + 7 + 19 − 18 − 8 + 33

=
= (−8 − 24) + (31 − 26) + (−28 + 7) + (19 − 18) + (−8 + 33)
= (−32 + 5 − 21) + (1 + 25)
= −48 + 26
= −22
(ii) −26 − 20 + 33 − (−33) + 21 + 24 − (−25) − 26 − 14 − 34
= (−26 − 20) + (33 + 33) + (21 + 24) + (25 − 26) + (−14 − 34)
= (−46 + 66) + (45 − 1 − 48)
= 20 − 4
= 16


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