Resposta:
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B) 2/5
2 x 5 = 10
5 x 5 = 25
10/25
C) 4/5
4 x 20 = 80
5 x 20 = 100
80/100
F) 3/8
3 x 7 = 21
8 x 7 = 56
21/56
G) 5/7
5 x 10 = 50
7 x 10 = 70
50/70
