Question

1°) Efetue as operações:

a) 3-7×3=

b) {4-[2×(8-12)]÷2}=

c) {2+[3÷(10-11)+1]÷2=

d) {[(8+4)÷3]×(3-1)}=​

Answer 1

Resposta:

A) 3 - (7 x 3) = 3 - (21) = -18 ✓

B) {4-[2x(8-12)]÷2}

{4-[16-24]÷2}

{4-[-8]÷2}

{4+4}

= 8 ✓

C) {2+[3÷(10-11)+1]÷2}

{2+[3÷(-1)+1]÷2}

{2+[-3+1]÷2}

{2+[-2]÷2}

{2-2÷2}

{0÷2}

= 0 ✓

D) {[(8+4)÷3]×(3-1)}

8 + 4 ÷ 3 x 3 - 1

12 ÷ 3 x 2

4 x 2

= 8 ✓