1.20米比( )米少20%.列式:( );2.( )米比20米少20%.列式:( );3.35千克比( )千克多40%.列式:(_数学解答

1.20米比( )米少20%.列式:( );
2.( )米比20米少20%.列式:( );
3.35千克比( )千克多40%.列式:( );
4.( )千克比35千克多40%.列式:( ).

人气：247 ℃　时间：2019-10-31 06:15:26

解答

1.20 / (1-20%) = 25
2.20 x (1-20%) = 16
3.35 / (1+40%) = 25
4.35 x (1+40%) = 49