Question

(+7).(-5)=
(-9).(-8)=
(+10).(+3)=
(+9).(-11)=

Answer 1

Resposta:

a) 7 x (-5)

- (7 x 5)

-35

b) ( -9) x ( -8)

9 x 8

72

d) 9 x ( -11)

- (9 x 11)

- (9( 10+1))

- (9 x 10 + 9 x 1)

- (90 + 9 x 1)

- (90 + 9)

- 99