Вправи 1201 - 1300 » 1222

Обчисли: 1) 14/47 + 3/47 – 2/47 = 17/47 – 2/47 = 15/47 2) 19/49 – (14/49 + 3/49 ) = (19/49 – 14/49) – 3/49 = 5/49 – 3/49 = 2/49 3) 19/71 – 2/71 + 14/71 = 17/71 + 14/71 = 31/71 4) 31/33 – (14/33 – 7/33) = 31/33 – 7/33 = 24/33