1.38﹣0.03=
÷ =
0.28× =
36×25%=
﹣ =
0.72÷0.04=
400÷25÷4=
0.3×2÷0.3×2=
:x=: 3x﹣0.9=2.4 x+x=132
①
②(840÷35﹣18)×20
③2.32× +1.68÷0.6
④6÷( )