(1/2 / 3/4 - 4/9) / 3/5=
1/2 / 3/8 - 4/9 / 3/5=
3/5 / (9/10 - 3/5 * 8/9)=
3/5 / 9\10 - 3/5 * 8\9=
дроби срочно

1)(1/2*4/3 -4/9)*5/3=(2/3-4/9)*5/3=(6/9-4/9)*5/3=2/9*5/3=10/272)1/2*8/3-4/9*9/8=4/3-1/2=8/6-3/6=5/63)3/5*(9/10-8/15)=3/5*(27/30-16/30)=3/5*11/30=11/503/5*10/9-3/5*8/9=3/5*(10/9-8/9)=3/5*2/9)=2/15