Question

Faça os cálculos das expressões

a)4×10+7×11

b)97-[2+(3×13-2)]

c)[630÷6+(80+8×15)]÷5

d)3×{20+[(90-6×12)÷6]-2}

Answer 1

A)4×10+7×11=40+77=117

b)97-[2+(3×13-2)] =97-[2+(39-2)]=97-[2+37]=97-39=58


c)[630÷6+(80+8×15)]÷5=[630÷6+(80+120)]÷5=[630÷6+200]÷5=[105+200]÷5=305÷5=61

d)3×{20+[(90-6×12)÷6]-2} =d)3×{20+[(90-72)÷6]-2}=3×{20+[18÷6]-2}=3×{20+3-2}=3×21=63

ESPERO TER AJUDADO =)

Answer 2

A) 4 * 10 + 7 * 11
40 + 77
117

B) 97 - [2 + ( 3 * 13 - 2 )]
97 - [2 + ( 39 - 2 )]
97 - [2 + 37]
97 - 39
58

C) [630 / 6 + ( 80 + 8 * 15 )] / 5
[630 / 6 + ( 80 + 120)] / 5
[630 / 6 + 200] / 5
[105 + 200] / 5
305 / 5
61

D) 3 * {20 + [(90 - 6 * 12 ) / 6] - 2}
3 * {20 + [ (90 - 72) / 6] - 2}
3 * {20 + [ 18 / 6] -2}
3 * {20 + 3 - 2}
3 * 21
63