9﹣0.99= 24÷=
2022÷2021= -=
2×0.8= 75﹣20= ×12= 42÷=
+= 1.5÷3= 501×100≈ ×0÷=
4.25+5.75=
10﹣0.01=
0.8×0.4=
105×4=
27+68=
× =
72÷ =
6.3+0.1=
398×5≈
538÷9≈
3.5+0.8=
3﹣1.6=
0.23÷0.1=
3.14×4=
﹣ =
1﹣ + =
+ × =
( )