Question

observe o exemplo e resolva:
((3/5 : 4/2 = 3/5 x 2/4 = 6/20))

1/5 : 3/7 =
5/8 : 8/6 =

a- ( ) 3/15 - 40/60
b- ( ) 7/15 - 25/64
c- ( ) 4/15 - 20/34
d- ( ) 5/15 - 30/64​

Answer 1

Resolução!

■ Divisão de frações

= 1/5 : 3/7

= 1/5 × 7/3

= 7/15

= 5/8 : 8/6

= 5/8 × 6/8

= 30/64 ÷ 2

= 15/32

Espero ter ajudado

Answer 2

Explicação passo-a-passo:

$\dfrac{1}{5} \div \dfrac{3}{7}$

$\dfrac{1}{5} \times \dfrac{7}{3}$

=>7/15

__________

$\dfrac{5}{8} \div \dfrac{8}{6}$

$\dfrac{5}{8} \times \dfrac{6}{8}$

$\dfrac{30 {}^{ \div 2} }{64 {}^{ \div 2} }$

=>15/32