Question

21. Find the sum of the following
a) (-8) + 7 +63) + (-7).
b) (-400 + (-144) + 16 + (-2).
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Answer 1

Answer:

$a) \: \: \: ( - 8) + 7 + 63 + ( - 7) \\ \: \: \: \: = - 8 + 7 + 63 - 7 \\ \: \: \: \: = \underline{ \underline{ 55}} \\ \\ b) \: \: \: (-400) + (-144) + 16 + (-2) \\ \: \: \: \: = - 400 - 144 + 16 - 2 \\ \: \: \: \: = \underline{ \underline{ - 530}}$