怎样简便怎样算:5分之1乘以8除以5分之4.5分之3加2分之1乘以5分之4.6分之5除以3分之2除以6分之5.
2个回答

1/5×8÷4/5           (3/5+1/2)×4/5   5/6÷2/3÷5/6

=1/5×8×5/4         =11/10×4/5     =5/6÷5/6÷2/3

=2               =44/50         =1÷2/3                         =22/25        =3/2           (5/8+5/6)×4/25      (5/6-2/3)×9/10   1-7/9÷7/8

=5/8×4/25+5/6×4/25  =1/6×9/10     =1-7/9×8/7        =1/10+2/15        =3/20        =1-8/9

=7/30                       =1/9