Question

Quanto é.

7 : 1/3 =
2 : 4/5 =
3/8 : 6 =
10/9 : 5 =
2/5 : 6/7 =
8/5 : 2/15 = ​

Answer 1

Resposta:

7:1/3=

7/1.3/1=21/1=21

2:4/5=

2/1.5/4=10/4=5/2

3/8:6=

3/8.1/6=3/48=1/16

10/9:5=

10/9.1/5=10/45=2/9

2/5:6/7=

2/5.7/6=14/30=7/15

8/5:2/15=

8/5.15/2=120/10=60/5=12/1=12

Explicação passo-a-passo:

Quando a fração está de divisão, diferente de zero, multiplicamos a primeira pelo inverso da segunda

Exemplos:4/5:5/6=

4/5.6/5=24/25

Answer 2

Resposta:

Explicação passo a passo:

A)

7 : 1/3

= 7 . 3

= 21

__________

B)

2 : 4/5

= 2 . 5/4

= 10/4 (:2)/(:2)

= 5/2

____________

C)

3/8 : 6

= 3/8 . 1/6

= 3/6 (:3)/(:3) . 1/8

= 1/2 . 1/8

= 1/16

__________

D)

10/9 : 5

= 10/9 . 1/5

= 10/5 . 1/9

= 2 . 1/9

= 2/9

__________

E)

2/5 : 6/7

= 2/5 . 7/6

= 2/6 (:2)/(:2) . 7/5

= 1/3 . 7/5

= 7/15

_________

F)

8/5 : 2/15

= 8/5 . 15/2

= 15/5 . 8/2

= 3.4

= 12