1.38﹣0.03=
÷ =
0.28× =
36×25%=
﹣ =
0.72÷0.04=
400÷25÷4=
0.3×2÷0.3×2=
1﹣+= 1÷×= 0.5﹣+0.5﹣=
8.1+= (+)×24= 7××7÷=