买哪种规格的牙膏合算呢?通过计算说明。
2.3×5=
0.3+0.01=
4÷0.5=
6.7-2.3=
2.3÷0.01=
8×0.25=
6÷0.3=
0.36÷1.2=
1.6×0.3=
6.2-2.8=
2.46÷0.6=
1.43+6.07=
11.7﹣8.9=
3.2÷0.8=
0.58+0.42×0=
4.5÷5=
1.25×0.8=
0.5×0.6=
1.8×4÷1.8×4=