Question

1 – Efetue as operações:
a) 3 – 7 · 3 =
b) 5 + 2 · 8 =
c) 50 – 25 · 2 =
d) 30 + 8 : (-2) =
e) 15 : 5 – 10 =
f) 3 + 6 · 2 – 15 : (-3) =
g) {4 – [2 · (8 – 12)] : 2} =
h) {2 + [3 : (10 – 11) + 1] : 2} =
i) 5 · [(8 – 5) · (2 + 7)] =
j) {[(8 + 4) : 3] · (3 – 1)} =
k) {[(50 · 3) + (2 · 25) : 4} =
l) (+3)2 : 3 + 5 =
m) (+12)2 : 72 – 3 =

Answer 1

a) 3 - 7 · 3 = -18

b) 5 + 2 · 8 = 21

c) 50 - 25 . 2 = 0

d) 30 + 8 ÷ (-2) =  26

e) 15 ÷ 5 - 10 = - 7

f) 3 + 6 . 2 - 15 : (-3) = 20

g) {4 – [2 · (8 – 12)] : 2} = 8

h)  {2 + [3 : (10 – 11) + 1] : 2} = 1

i) 5 · [(8 – 5) · (2 + 7)] = 135

j) {[(8 + 4) : 3] · (3 – 1)} = 8

k) {[(50 · 3) + (2 · 25) : 4} = 162,5

l) (+3)2 : 3 + 5 = 7

m) (+12)2 : 72 – 3 = -2,6