题干
计算下面各题，能简算的要简算．
0.25×
+2.5%
| 4 |
| 5 |
| 7 |
| 9 |
| 3 |
| 4 |
| 5 |
| 6 |
| 7 |
| 3 |
| 4 |
4.05﹣2.83﹣0.17．
答案(点此获取答案解析）
解：①0.25×
+2.5%
| 4 |
| 5 |
=0.2+0.025
=0.225；
②
| 4 |
| 5 |
| 7 |
| 9 |
| 3 |
| 4 |
| 5 |
| 6 |
| 7 |
| 3 |
| 4 |
| 4 |
| 5 |
