解下列方程．
0.3x+6.5×3=31.2
0.5x+0.6x=19.91
0.5×40﹣2.5x=3.75
0.3x+1.2×3=10.5．
直接写出结果．
| 1﹣0.01= |
0.2×0.3= |
0.32÷0.4= |
0.5﹣0.05= |
| 2.5+6.5= |
1÷0.01= |
10÷0.5= |
2.4×5= |
下面各题怎样简便就怎样计算．
| 15.64﹣2.53﹣7.47 |
2.5×1.4×4 |
8.3×5.7+5.7×1.7 |
| 4.7+7.69+5.3+2.31 |
0.2×9.9+0.02 |
38×0.3﹣7.2 |
竖式计算．
3.906+0.66=
7.04×2.5=
8.64÷8=
73﹣33.16=
直接写出得数．
| 0.35+0.45= |
0.5×100= |
29×9+29= |
3.8+0.12= |
0.6﹣0.37= |
| 10﹣0.09= |
5÷1000= |
4.8÷100×10= |
6﹣0.61﹣0.39= |
4.9+0.1﹣4.9+0.1= |