Question

Efetue as multiplicações
a) (+1/5). (+4/3) =
b) (+4/9). ( -7/5) =
c) (-3/2). ( -5/7) =
d) (-1/5). (+1/4) =
e) (+2/3). (-1/3) =
f) (-5/8). (-4/3) =
g) (+4/5). (-1/3) =
h) (-3/5). (-7/4) =

Answer 1

Resposta:

Explicação passo-a-passo:

Efetue as multiplicações

a) (+1/5). (+4/3) = 4/15

b) (+4/9). ( -7/5) = - 28/45

c) (-3/2). ( -5/7) = +15/14

d) (-1/5). (+1/4) = -1/20

e) (+2/3). (-1/3) = - 2/9

f) (-5/8). (-4/3)

= 4/3 . 5/8

= 4/8 (:4)/(:4) . 5/3

= 1/2 . 5/3

= 5/6

g) (+4/5). (-1/3) = - 4/15

h) (-3/5). (-7/4) = +21/20

Answer 2

Resposta: 4/15. -27/45.

+15/14. -1/20.

2/9. (- 4/3)

5/8. 5/3

5/3. 5/6

Explicação passo a passo:

1/5). (+4/3) = 4/15

b) (+4/9). ( -7/5) = - 28/45

c) (-3/2). ( -5/7) = +15/14

d) (-1/5). (+1/4) = -1/20

e) (+2/3). (-1/3) = - 2/9

f) (-5/8). (-4/3)

= 4/3 . 5/8

= 4/8 (:4)/(:4) . 5/3

= 1/2 . 5/3

= 5/6