Решите дроби (подробно) 4/9+11/15= 5/6-3/4= 5/8+7/9= 8/11-5/12= 8/11-5/8= помогите...

Question

Решите дроби (подробно)
4/9+11/15=
5/6-3/4=
5/8+7/9=
8/11-5/12=
8/11-5/8=
помогите пожалуйста...!! Срочно

Answer 1

1)4/9+11/15=(4/9)*5+(11/15)*3=20/45+33/45=53/45=1 8/45
5/6-3/4=(5/6)*2-(3/4)*3=10/12-9/12=1/12
5/8+7/9=(5/8)*9+(7/9)*8=45/72+56/72=101/72=1 29/72
8/11-5/12=(8/11)*12-(5/12)*11=96/132-55/132=41/132
8/11-5/8=(8/11)*8-(5/8)*11=64/88-55/88=9/88