用你喜欢的方法计算.
| 2.9+2.9×(2.9-2.9) | 1.21×42-(4.46+0.14) | [1-(
| ||||||
| 5.25×104 | (
|
1375+450÷18×25. |
| 2.9+2.9×(2.9-2.9) | 1.21×42-(4.46+0.14) | [1-(
| ||||||
| 5.25×104 | (
|
1375+450÷18×25. |