Розділ 6. Звичайні дроби » 1032

Знайдіть різницю чисел: 1) 55/7 – 36/7 = (5 + 5/7) – (3 + 6/7) = (5 – 3) + 5/7 – 6/7 = 1 + (7/7 + 5/7 – 6/7) = 1 + (12/7 – 6/7) = 1 + 6/7 = 16/7 2) 123/10 – 67/10 = (12 – 6) + 3/10 – 7/10 = 5 + (10/10 + 3/10 – 7/10) = 5 + (13/10 – 7/10) = 5 + 6/10 = 56/10 3) 204/23 – 1619/23 = (19 + (23/23 + 4/23)) – (16 + 19/23) = (19 – 16) + (27/23 – 19/23) = 38/23 4) 3512/39 – 3428/39 = (34 + (39/39 + 12/39)) – (34 + 28/39) = (34 – 34) + (51/39 – 28/39) = 23/39