2.8÷0.2=
4.05-4=
3.6÷0.01=
1.25×8=
0.4÷8=
0÷3.9=
0.54÷6=
7.2÷0.6=
3.9×0.013.9÷100 1.231.233 2.466
+ = 50÷50%= = 3 -1.125=
1.9÷2.5÷0.4= ( )×18= = 1- =