题目内容
| 1 |
| 8 |
| 1 |
| 8 |
| 1 |
| 4 |
| 1 |
| 8 |
6
6
.分析:因为
=
,原式变为
+
+
×2,即
+
+
×4,运用乘法分配律改写成
×6,解决问题.
| 1 |
| 4 |
| 2 |
| 8 |
| 1 |
| 8 |
| 1 |
| 8 |
| 2 |
| 8 |
| 1 |
| 8 |
| 1 |
| 8 |
| 1 |
| 8 |
| 1 |
| 8 |
解答:解:
+
+
×2,
=
+
+
×2,
=
+
+
×4,
=
×(1+1+4),
=
×6;
故答案为:6.
| 1 |
| 8 |
| 1 |
| 8 |
| 1 |
| 4 |
=
| 1 |
| 8 |
| 1 |
| 8 |
| 2 |
| 8 |
=
| 1 |
| 8 |
| 1 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 8 |
=
| 1 |
| 8 |
故答案为:6.
点评:完成本题要注意分析式中数据,运用合适的简便方法计算.
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