Вправи: 94

94. Виконайте дію:

1) 34m + 25m = 15+820m = 2320m;

2) x6y – 3x8y = 4x-9x24y = –5x24y;

3) 4a9m2 + 5a12m2 = 16a+15a36m2 = 31a36m2;

4) 4x215y – x210y = 8x2- 3x230y = 5x230y = x26y.