Question

efetue as fracoes 3/10 +2/5, 1/3+5/12+10/15, 2/3+4/10+1/15

Answer 1

3/10 + 2/5 mmc 10,5 = 10
3/10 + 2(x2)/5(x2)
3/10 + 4/10 = 7/10

1/3 + 5/12 + 10/15 mmc 3,12,15 = 60
1(x20)/3(x20) + 5(x5)/12(x5) + 10(x4)/15(x4)
20/60 + 25/60 + 40/60 = 85/60

2/3 + 4/10 + 1/15  mmc 3,10,15 = 30
2(x10)/3(x10) + 4(x3)/10(x3) + 1(x2)/15(x2)
20/30 + 12/30 + 2/30 = 34/30