§ 5. Звичайні дроби » 1085

Обчисліть: 1) 115/12 – (37/12 – 11/12) = 115/12 – (3 – 1 + 7/12 – 1/12) = 115/12 – (2 + 6/12) = 115/12 – 26/12 = (10 – 2 + 17/12 – 6/12) = 811/12 2) 91/10 – (45/11 + 26/11) = 91/10 – (4 + 2 + 5/11 + 6/11) = 91/10 – (6 + 11/11) = 91/10 – 7 = 21/10