1﹣0.01=
7÷1.4=
720﹣80=
90÷70=
2.25+ =
16×50%=
×3.6=
25.5÷0.1=
+ =
﹣ =
2﹣ ﹣ =
1.25×8=
( ): =
4×(0.6+1.9)=
(0.18+ )÷9=
× × =