Вправи 1201 - 1300 » 1269

Спрости вираз: 1) 712/13а + 41/13а = 1113/13а = 12а 2) 18х – 127/13х = 1713/13х – 127/13х = 56/13х 3) 1213/15m + 184/15m – 1017/15m = 3017/15m – 1017/15m = 20m