Question

Вычислите:
1)2/3*(3/4+5/8)=?
2)2-5/6:8/9=?
3)2/3:(3/4-5/12)=?
4)3-2/3*6/7=?
5)3/5*(4/21+2/7)=?
6)3-1/10:2/15=?
7)5/6:(3/4-1/12)=?
8)2-3/8*4/5=?

Answer 1

=2/3*(6/8+5/8)=2/3*11/8=11/12
=2-5/6*9/8=2-15/16=1  1/16
=2/3:(9/12-5/12)=2/3:4/12=2/3*12/4=4/2=2
=3-4/7=2  3/7
=3/5*(4/21+6/21)=3/5*10/21=2/7
=3-1/10*15/2=3-3/4=2  1/4
=5/6:(9/12-1/12)=5/6:8/9=5/6*9/8=15/16
=2-3/10=1  7/10