Найди сумму или разность: 7/10 -2/5 3/4 -1/6 4/45 -1/30 1/3 +1/6
1)7/10 - 2/5 = 7/10 - 4/10 = 3/10 2)3/4 - 1/6 = 9/12 - 2/12 = 7/12 3)4/45 - 1/30 = 8/90 - 3/90 = 5/90 = 1/18 4)1/3 + 1,6 = 2/6 + 1/6 = 3/6 = 1/2