题目内容
| 计算下列各题，怎样简便就怎样算． （1）4.73+9+27%-4 | （2）
| ||||||||
（3）
| （4）2.5×
|
（1）4.73+9+27%-4
=4.73+0.27+9-4
=5+9-4
=10；
（2）
×
+
×25%
=
×
+
×
=
×（
+
）
=
×1
=
；
（3）
×
+0.375+
×37.5%
=
×
+
+
×
=（
+
+1）×
=2×
=
；
（4）2.5×
+0.35×20%
=2.5×0.2+0.35×0.2
=（2.5+0.35）×0.2
=2.85×0.2
=0.57．
=4.73+0.27+9-4
=5+9-4
=10；
（2）
| 1 |
| 4 |
| 17 |
| 53 |
| 36 |
| 53 |
=
| 1 |
| 4 |
| 17 |
| 53 |
| 36 |
| 53 |
| 1 |
| 4 |
=
| 1 |
| 4 |
| 17 |
| 53 |
| 36 |
| 53 |
=
| 1 |
| 4 |
=
| 1 |
| 4 |
（3）
| 2 |
| 9 |
| 3 |
| 8 |
| 7 |
| 9 |
=
| 2 |
| 9 |
| 3 |
| 8 |
| 3 |
| 8 |
| 7 |
| 9 |
| 3 |
| 8 |
=（
| 2 |
| 9 |
| 7 |
| 9 |
| 3 |
| 8 |
=2×
| 3 |
| 8 |
=
| 3 |
| 4 |
（4）2.5×
| 1 |
| 5 |
=2.5×0.2+0.35×0.2
=（2.5+0.35）×0.2
=2.85×0.2
=0.57．
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