Розділ 6. Звичайні дроби » 1000

Обчисліть: 1) 1 – 5/17 – 6/17 = 1 – (5/17 + 6/17) = 1 – 11/17 = 17/17 – 11/17 = 6/17 2) 1 – 14/31 – 16/31 = 1 – (14/31 + 16/31) = 1 – 30/31 = 31/31 – 30/31 = 1/31 3) 1 – (2/27 + 14/27) = 1 – 16/27 = 27/27 – 16/27 = 11/27 4) 1 – (17/25 – 11/25) = 1 – 6/25 = 25/25 – 6/25 = 19/25