Question

a) 9/5 + 7/8 - 3/4 b) 13/5 - 2/3 + 5/4

Answer 1

Olá.
a)
9/5 + 7/8 - 3/4 ==>o mmc de (5,8,4)=40
72/40+35/40-30/40
107/40 - 30/40
77/40

b) 
13/5 - 2/3 + 5/4==>0 mmc de (5,3,4)=60
156/60 - 40/60 + 75/60
231/40 - 40/60
191/60

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