递等式计算,能巧算的要巧算:
| 32×25×125 | 384+196+216+104 | 8×(125+25)×4 |
| 2070÷[(1804-274)÷17] | 78×57-78+78×43 | 831-(23×40-126) |
直接写出得数.
| 1.9+3.01= | 0.23×400= | 5× | |
| ( | 10- |
| 32×25×125 | 384+196+216+104 | 8×(125+25)×4 |
| 2070÷[(1804-274)÷17] | 78×57-78+78×43 | 831-(23×40-126) |
| 1.9+3.01= | 0.23×400= | 5× | |
| ( | 10- |