§ 5. Звичайні дроби » 1072

Обчисліть: 1) 11/7 + 23/7 = (1 + 2) + (1/7 + 3/7) = 34/7 2) 32/9 + 17/9 = (3 + 1) + (2/9 + 7/9) = 4 + 9/9 = 5 3) 53/10 – 32/10 = (5 – 3) + (3/10 – 2/10) = 21/10 4) 36/11 – 16/11 = (3 – 1) + (6/11 – 6/11) = 2