Завдання 201 - 300 » 254
Обчисли: 1) 7/15 – 1/6 – 1/10 = (28 - 10 - 6)/60 = 12/60 = 1/5; 2) 9/10 – 7/15 + 4/45 = (81 - 42 + 8)/90 = 47/90; 3) 7/18 – 1/5 + 1/9 = (35 - 18 + 10)/90 = 27/90 = 3/10.
Обчисли: 1) 7/15 – 1/6 – 1/10 = (28 - 10 - 6)/60 = 12/60 = 1/5; 2) 9/10 – 7/15 + 4/45 = (81 - 42 + 8)/90 = 47/90; 3) 7/18 – 1/5 + 1/9 = (35 - 18 + 10)/90 = 27/90 = 3/10.