Решите дробь 1.(19/25-7/13)*13/12 2.(1/13-2 3/4)*26 3.(5/6+1 1/10)*24

1)((247-175)/325)*13/12 72*13/3900 936/3900 6/25=0.24

1) (19/25-7/13)*13/12 = 19/25*13/12-7/13*13/12 = 19/25*13/12-7/12= 247/300-175/300 = 72/300=6/25
2) (1/13 - 2 3/4)*26 = 1/13*26 - 11/4*26 = 2 - 143/2 = -139/2 = -69 1/2
3) (5/6 + 11/10)*24= 5/6*24 + 11/10*24 =20 + 132/5 =20 + 26 2/5 =46 2/5