Розділ 6. Звичайні дроби » 1001

Обчисліть: 1) 5 – 15/60 – 22/60 = 5 – (15/60 + 22/60) = 5 – 37/60 = 4 + 60/60 – 37/60 = 4 + 23/60 = 423/60 2) 10 – 12/15 – 3/15 = 10 – (12/15 + 3/15) = 10 – 15/15 = 10 – 1 = 9 3) 3 – (11/43 + 19/43) = 3 – 30/43 = 2 + 43/43 – 30/43 = 213/43 4) 10 – (34/50 – 17/50) = 10 – 17/50 = 9 + 50/50 – 17/50 = 933/50