Вправи 201 - 300 » 261

Обчисліть: 1) 5/11 + 3/11 = 8/11; 2) 7/15 – 4/15 = 3/15; 3) 6 + 5/13 = 65/13; 4) 24/13 + 52/13 = 76/13; 5) 411/18 – 15/18 = 36/18; 6) 1 – 9/16 = 16/16 – 9/16 = 7/16; 7) 6 – 37/11 = 511/11 – 37/11 = 24/11; 8) 72/9 – 25/9 = 611/9 – 25/9 = 46/9.