Question

Hei ,va rog sa ma ajutati urgent
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Answer 1

1,2=12/10

1 4/5= 1×5+4/5=9/5

12/10-9/5 simplificam a doua fractie cu 2

12/10-18/10=-6/10

5 1/2= 5×2+1/2=11/2

2,5=25/10

11/2-25/10 simplificam prima fractie cu 5

55/10-25/10= 30/10