Question

Resolva as operações abaixo a , - 20 + 7 + 11
B, 15-5-7

Answer 1

$a) - 20 + 7 + 11 \\ - 20 + 18 \\ \boxed{ - 2}$

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$b)15 - 5 - 7 \\ 15 - 12 \\ \boxed{3}$

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