ВЫЧИСЛИТЕ:
2) (46 2/9 - 25) - (11 4/7 - 2/3);
4) 11 1/2 - 4/15) - (7 - 19/30)

2) (46*9+2/9)-(81/7-2/3)= 426/9-257/21=(2982-771)/63=2211/63= 35 6/63

4) (23/2-4/15) - ( 210/30 -19/30)= ((345-8)/30)-(191/30)=337/30-191/30=146/30=4 26/30= 4 13/15