Question

Exercício 5. Efetue as multiplicações:

a) ( + 5 ) . ( + 3 )

b) ( + 4 ) . ( – 5 )

c) ( – 8 ) . ( + 4 )

d) ( – 6 ) . ( – 7 )

e) ( – 2 ) . ( + 4 ) . ( + 3 ) . ( – 1 )

f) ( – 5 ) . ( – 6 ) . ( – 2 )​

Answer 1

Resposta:

Olá

Resolução:

a)

5,4 x 3,1

16,74

b)

(- 45/49) x (48/18)

- 45/49 × 8/3

- 15/49 × 8

- 120/48

c)

8,7 × 5/4

87/10 × 5/4

87/2 × 1/4

87/8

d)

(- 36/15) x (- 50/12)

3/3 × 10

1 × 10

10

e)

(- 4,6) × (- 0,7)

4,6 × 0,7

3,22

f )

(-5)×(-6)×(-2)=

(+30)×(-2)=

(-60)