Question

Me ajudem respondendo as operações ​

Answer 1

Resposta:

Explicação passo a passo:

1)

2/3 . 3/4

= 3/3 . 2/4 (:2)/(:2)

= 1 . 1/2

= 1/2

______________

2)

7/9 . 3/5

= 7/5 . 3/9 (:3)/(:3)

= 7/5 . 1/3

= 7/15

________________

3)

5/8 . 2/10 (:2)/(:2)

= 5/8 . 1/5

= 5/5 . 1/8

= 1/8

_____________

4)

5/12 . 6/15

= 5/15 (:5)/(:5) . 6/12 (:6)/(:6)

= 1/3 . 1/2

= 1/6

_______________

5)

4/21 ÷ 8/7

= 4/21 . 7/8

= 4/8 (:4)/(:4) . 7/21 (:7)/(:7)

= 1/2 . 1/3

= 1/6

____________

6)

20/30 ÷ 5/6

= 2/3 . 6/5

= 6/3 . 2/5

= 2 . 2/5

= 4/5

_____________

7)

4/75 : 8/15

= 4/75 . 15/8

= 4/8 (:4)/(:4) . 15/75 (:15)/(:15)

= 1/2 . 1/5

= 1/10

_____________

8)

3/40 ÷ 8/200

= 3/40 . 200/8

= 3/40 . 25

= 25/40 (:5)/(:5) . 3

= 5/8 . 3

= 15/8