Question

Efetue as divisões, simplificando o resultado quando possivel:
a) 3/4 ÷ 2/5
d) 5/7 ÷ 2/3
c) 4/5 ÷ 3/7
d) 2/9 ÷ 7/8
e) 1/6 ÷ 5/3
f) 7/8 ÷ 3/4
g) 8/7 ÷ 9/2
h) 4/5 ÷ 2/5
i) 5/8 ÷ 3/4
j) 2/9 ÷ 4/7

por favor me ajudem​

Answer 1

Resposta:

Explicação passo-a-passo:

a) 3/4 ÷ 2/5

= 3/4 . 5/2

= 15/8

_____________

B) 5/7 ÷ 2/3

= 5/7 . 3/2

= 15/14

___________

c) 4/5 ÷ 3/7

= 4/5 . 7/3

= 28/15

___________

d) 2/9 ÷ 7/8

= 2/9 . 8/7

= 16/63

__________

e) 1/6 ÷ 5/3

= 1/6 . 3/5

= 3/6 (:3)/(:3) . 1/5

= 1/2 . 1/5

= 1/10

___________

f) 7/8 ÷ 3/4

= 7/8 . 4/3

= 4/8 (:4)/(:4) . 7/3

= 1/2 . 7/3

= 7/6

___________

g) 8/7 ÷ 9/2

= 8/7 . 2/9

= 16/63

___________

h) 4/5 ÷ 2/5

= 4/5 . 5/2

= 4/2 . 5/5

= 2.1

= 2

___________

i) 5/8 ÷ 3/4

= 5/8 . 4/3

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

= 1/2 . 5/3

= 5/6

___________

j) 2/9 ÷ 4/7

= 2/9 . 7/4

= 2/4 (:2)/(:2) . 7/9

= 1/2 . 7/9

= 7/18