Выполните действия 2 3/4-1 5/6. 4 2/5+ 3 5/6. 7 5/12- (1 5/8+2 1/24)

2 3/4 - 1 5/6 = 11/4*6 - 11/6*4=66-44=22
4 2/5 + 3 5/6= 22/5*6+23/6*5=132+115=247
7 5/12 - (15/8+2 1/24)=89/12*2-(15/8*3+49/24)=178-(45+49)=178-94=84

2 3/4=11/4
1 5/6=11/6
33/12-22/12=11/12;
22/5+23/5=45/5=9;
1 15/24+2 1/24=3/16/24
7 10/24-3 16/24=178/24-88/24=90/24=45/12=3 9/12=3 3/4