Question

preciso pra hoje pleaseeeee
$\frac{1}{2} + - \frac{1}{5} =$
$3 - \frac{1}{2} =$
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Answer 1

1/2+ _1/5= 5/10 + _2/10 = 3/10

3 -1/2= 6/2 -1/2= 5/2