Найдите значение выражения: а) 3/5-1/4+1/3 б) 1/3-1/9+1/6 в)(2/3+1/9)-13/18 г)3/4-1/2+7/8 д)5/6-2/3+1/4 е)1/3-(1/9+1/6)

а) 3/5 - 1/4 + 1/3 = (3 * 12) / (5 * 12) + (1 * 15) / (4 * 15) + (20 * 1) / (3 * 20) = 36/60 + 15/60 + 20/60 = (36 + 15 + 20) / 60 = 71/60 = 1 11/60.

б) 1/3 - 1/9 + 1/6 = (1 * 6) / (3 * 6) - (1 * 2) / (9 * 2) + (1 * 3) / (6 * 3) = 6/18 - 2/18 + 3/18 = (6 - 2 + 3) / 18 = 7/18.

в) (2/3 + 1/9) - 13/18 = (6/9 + 1/9) - 13/18 = 7/9 - 13/18 = 14/18 - 13/18 = 1/18.

г) 3/4 - 1/2 + 7/8 = (3 * 2) / (4 * 2) - (1 * 4) / (2 * 4) + 7/8 = 6/8 + 4/8 + 7/8 = 17/8 = 2 1/8.

д) 5/6 - 2/3 + 1/4 = 10/12 - 8/12 + 3/12 = 5/12.

е) 1/3 - (1/9 + 1/6) = 6/18 - (2/18 + 3/18) = 6/18 - 5/18 = 1/18.