Question

Resolva as seguintes expressões numéricas:
a) 30 − 7 × 8 + 80 ÷ 5 =
b) 40 + {15 + 4[90 ÷ (21 − 4 × 3)] + 7} ÷ 31

Answer 1

Resposta:

A) =−10

B)=42

Explicação passo-a-passo:

A)=30−56+16=  

=−26+16=

=−10

B)=40+{15+4⋅[90:(21−12)]+7}:31=  

=40+{15+4⋅[90:(9)]+7}:31=

=40+{15+4⋅[10]+7}:31=

=40+{15+40+7}:31=

=40+{55+7}:31=

=40+{62}:31=

=40+2=

=42