Завдання 201 - 300 » 240

Виконай дії: 1) 55/8 + 7/8 = 512/8 = 61/2; 2) 71/9 + 198/9 = 269/9 = 27; 3) 43/7 – 21/7 = 22/7; 4) 91/9 – 54/9 = 810/9 – 54/9 = 36/9 = 32/3; 5) 21/3 + 52/3 – 41/8 = 73/3 – 41/8 = 8 – 41/8 = 78/8 – 41/8 = 37/8; 6) 3/5 + 2/5 + 7/9 + 2/9 – 11/2 = 1 + 1 – 11/2 = 2 – 11/2 = 12/2 – 11/2 = 1/2.