Завдання 201 - 300 » 285

Обчисли: 1) 47/10 + 24/5 = 6(7 + 8)/10 = 615/10 = 615/10 = 63/2 = 71/2; 2) 53/5 + 75/6 = 12(18 + 25)/30 = 1243/30 = 1313/30; 3) 79/14 + 116/21 = 8(27 + 32)/42 = 859/42 = 917/42; 4) 57/8 + 911/20 = 14(35 + 22)/40 = 1457/40 = 1517/40.