Вычислите значение выражения, используя свойства сложения. 1) 1) 7/18 + 11/24 + 5/18 + ......... 2) 11/50 + 8/15 + 2/15

1) 7/18 + 11/24 + 5/18 + 13/24 = (7/18 + 5/18) + (11/24 +13/24) = 12/18 + 24/24 = 1(2/3).2) 11/50 + 8/15 + 2/15 + 14/5 = (11/50 + 14/50) + (8/15 + 12/15) = 1/2 + 2/3 = 1(1/6).3) 1(3/32) + 3(7/72) + 2(5/32) + 4(1/36) = (1(3/32) + 2(5/32)) + (3(7/72) + 4(1/36)) = 3(1/4) + 7(1/8) = 10(3/8).