神机妙算（能简算的要写出简算过程）（1）4113×34+5114×45+6115×56+7116×67+8117×78+9118×89（2）25×16%+114×21.75+114+2÷45+2.5÷322（3）517-23×2514÷[(3112+4.375)÷1989]（4）已知-数学
| 4 |
| 5 |
| 6 |
| 5 |
| 5 |
| 6 |
| 7 |
| 6 |
| 6 |
| 7 |
| 8 |
| 7 |
| 7 |
| 8 |
| 9 |
| 8 |
| 8 |
| 9 |
=40×
| 3 |
| 4 |
| 4 |
| 3 |
| 3 |
| 4 |
| 4 |
| 5 |
| 5 |
| 4 |
| 4 |
| 5 |
| 5 |
| 6 |
| 6 |
| 5 |
| 5 |
| 6 |
| 6 |
| 7 |
| 7 |
| 6 |
| 6 |
| 7 |
| 7 |
| 8 |
| 8 |
| 7 |
| 7 |
| 8 |
| 4 |
| 5 |
| 6 |
| 5 |
| 5 |
| 6 |
| 7 |
| 6 |
| 6 |
| 7 |
| 8 |
| 7 |
| 7 |
| 8 |
| 9 |
| 8 |
| 8 |
| 9 |
| 3 |
| 4 |
| 4 |
| 3 |
| 3 |
| 4 |
| 4 |
| 5 |
| 5 |
| 4 |
| 4 |
| 5 |
| 5 |
| 6 |
| 6 |
| 5 |
| 5 |
| 6 |
| 6 |
| 7 |
| 7 |
| 6 |
| 6 |
| 7 |
| 7 |
| 8 |
| 8 |
| 7 |
| 7 |
| 8 |
