Question

RESOLVA AS SEGUINTES EXPRESSÕES NUMÉRICAS

a) [ ( -4) + (-7). (+8 ) ] : 12
b) (+7) + (-3) .( -8)

c) 4.(-8) +8.(+8) +1.(-6) +7.(+6)
d) -67 –( +16-9+24)

e ) +40 . 8 : 5 f) 27 -5 x 4 + 16 : 2

g) [ 12 : (+3+1) +5 .(+9)]
h) (-20 : +5 +3 ). (+2)​

Answer 1

a) [-4 + (-7) × 8] ÷ 12.

[-4 + (-56)] ÷ 12.

-60 ÷ 12 = -5.

b) 7 + (-3) × (-8).

7 + 24 = 31.

c) 4 × (-8) + 8 × 8 + 1 × (-6) + 7 × 6.

-32 + 64 + (-6) + 42 = 68.

d) -67 - (16 - 9 + 24).

-67 - 31 = -98.

e) 40 × 8 ÷ 5.

320 ÷ 5 = 64.

g) 12 ÷ (3 + 1) + 5 × 9.

12 ÷ 4 + 5 × 9.

3 + 45 = 48.

h) (-20 ÷ 5 + 3) × 2.

(-4 + 3) × 2.

-1 × 2 = -2.