题干
计算：﹣45×（
+1
﹣0.4）
| 1 |
| 9 |
| 1 |
| 3 |
答案(点此获取答案解析）
解：﹣45×（
+1
﹣0.4）
| 1 |
| 9 |
| 1 |
| 3 |
=﹣45×
| 1 |
| 9 |
| 1 |
| 3 |
| 1 |
| 9 |
| 1 |
| 3 |
