Question

escreva frações decimais equivalentes as

A) 2/5
B) 3/4
C) 3/8
D) 18/40

Answer 1

A) 2/5 = 4/10 = 40/100

2/5 . 5/5 = 10/25
2/5 . 2/2 = 4/10
2/5 . 20/20 = 40/100

B)
3/4 = 6/8 = 60/80

3/4 . 2/2 = 6/8
3/4 . 10/10 = 30/40
3/4 . 3/3 = 9/12

C)
3/8 = 6/16 = 30/80

3/8 . 2/2 = 6/16
3/8 . 10/10 = 30/80
3/8 . 4/4 = 12/32

D)
18/40 = 9/20 = 90/200

18/40 (:2)/(:2) = 9/20
18/40 . 2/2 = 36/80
18/40 . 5/5 = 90/200