ГДЗ Математика 8 клас Істер (2025) - 1 ЧАСТИНА

Виконайте дію:

1) 3/4m + 2/5m = (15+8)/20m = 23/20m;
2) x/6y – 3x/8y = (4x-9x)/24y = –5x/24y;
3) 4a/(9m^2 ) + 5a/(12m^2 ) = (16a+15a)/(36m^2 ) = 31a/(36m^2 );
4) (4x^2)/15y – x^2/10y = (8x^2- 3x^2)/30y = (5x^2)/30y = x^2/6y.