Завдання 201 - 300 » 276

Обчисли: 1) 31/9 + 4 = 71/9; 2) 5 + 27/19 = 77/19; 3) 11/2 + 1/7 = 1(7 + 2)/14 = 19/14; 4) 81/5 + 1/10 = 8(2 + 1)/10 = 83/10; 5) 73/9 – 1 = 63/9; 6) 5 – 41/3 = 43/3 – 41/3 = 2/3. 7) 21/2 – 1/4 = 2(2 - 1)/4 = 21/4; 8) 32/3 – 1/9 = 3(6 - 1)/9 = 35/9.