Question

1) Efetue as multiplicações a) (+3) · (+2) = b) (+8) · (–3) = c) (–7) · (+1) = d) (–8) · (–4) = e) (+1) · (–9) = f) (–8) · (+1) = g) (+10) · (+9) = me ajudem por favor !!

Answer 1

Resposta:

Explicação passo-a-passo:

a) (+3) · (+2) = 6

b) (+8) · (–3) = -24

c) (–7) · (+1) = -7

d) (–8) · (–4) = 32

e) (+1) · (–9) = -9

f) (–8) · (+1) = -8

g) (+10) · (+9) = 90

sinais iguais +

sinais diferentes -

-  ·  - = +

- · + = -

+  · + =  +