Решите а)3/4+1/6 б)3/5-1/7 в)1/6-2/9 г)1/6+3/10
3/4 + 1/6 =912 + 2/12 = 11/12 3/5 - 1/7 =21/35 - 5/35 = 16/35 1/6 - 2/9 =3 /18 - 4/18 = - 1/18 1/6 + 3/10 =5/30 + 9/30 = 14/30 = 7/15