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3/5 de 20 =12
3/4 de 20 =15
7/4 de 60 =105
Resolver
A. 1/5 de 20
1/5*20 = 20/5 = 4
B. 3/5 de 20
3/5*20= 60/5 = 12
C. 3/4 de 20
3/4*20 = 60/4 = 15
D. 7/4 de 60
7/4*60 = 420/4 = 105
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