2.4÷0.24=
6.53-6.1=
5.6÷0.7=
25×4×3.14=
3.5÷0.35=
30.5+5=
0.63÷9=
0.36÷0.09÷4=
10.7×0.45=
80.5÷0.25=
*7.8÷3.5≈
30.8÷14=
197.6÷0.52=
2÷18≈(保留两位小数)