Question

Resolva as expressões numéricas:
a) 40 - 5 + 15 - 9 =
b) 70 + 3 - 30 =
c) 5 x 2 + 7 =
d) 3 x 4 +9 : 3 =
e) (10:2) + 7 =
f) {[(2 x 5) x (6:3)] + 7} - 12 =

Answer 1

Resposta:

a) 41

b) 43

c) 17

d) 15

e) 12

f) 15

Explicação:

a) 40-5+15-9 =

35+15-9 =

50-9 =

41

b) 70+3-30 =

73-30 =

43

c) 5×2+7 =

10+7 =

17

d) 3×4+9÷3 =

12+3 =

15

e) (10÷2)+7 =

5+7 =

12

f) {[(2×5)×(6÷3)]+7}-12 =

{[10×2]+7}-12 =

{20+7}-12 =

27-12 =

15