(3 1_2 - 2 2_3 + 5 5_6 + 4 3_5)*24 ! _это дробь.

1) 3 1/2 + 4 3/5 = 3 5/10 + 4 6/10 = 7 11/10 = 8 1/10 
2) - 2 2/3 + 5 5/6 = - 2 4/6 + 5 5/6 = 3 1/6 
3) 8 1/10 + 3 1/6 = 8 6/60 + 3 10/60 = 11 16/60 = 11 4/15 
4) 11 4/15 * 24 = 169/15 * 24 = 1352/5 = 270 2/5

Смотри фото)))))))))))))))