Question

Qual e a sub tração diferentes denominadores desses números 2/5_2/7 3/5_4/7 3/4_5/1

Answer 1

2/5-2/7 .... mmc(7,5)=35
14-10/35=4/35

3/5-4/7.... mmc(7,5)=35
21-20/35=1/35

3/4-5/1.... mmc(1,4)=4
3-20/4= -17/4