Вычислите сумму 5 целых 27/40 + 13 целых 19/30 и выполните действие 13 целых 1/14

5 27/40 + 13 19/30 = (40 * 5 + 27 / 40) + (30 * 13 + 19 / 30) = 227/40 + 409/30 = 681/120 +

+ 1636/120 = 2317/120 = 19 37/120;

13 1/14 - (3 5/21 + 4 6/7) = (14 * 13 + 1 / 14) - ((21 * 3 + 5 / 21) + (7 * 4 + 6 / 7)) = 183/14 -

- (68/21 + 34/7) = 183/14 - (68/21 + 102/21) = 183/14 - 170/21 = 1098/84 - 680/84 = 418/84 =

= 209/42 = 4 41/42.