Question

Сократите дробь и вычеслите

1) 13/18 + 7/12 =
2) 9/14 + 8/21 =
3) 5/7 - 3/5 =
4) 5/6 - 3/4 =

Answer 1

1) 13/18+7/12=26+21/36=47/36=1 11/36
2) 9/14+8/21=27+16/42=1 1/42
3) 5/7-3/5=25-21/35=4/35
4) 5/6-3/4=10-9/12=1/12