题目内容
简便运算：
×
+1÷
+
×
．
| 5 |
| 16 |
| 4 |
| 7 |
| 16 |
| 5 |
| 3 |
| 7 |
| 5 |
| 16 |
考点：分数的简便计算
专题：运算定律及简算
分析：利用分配律的逆运算进行计算．
解答：
解：
×
+1÷
+
×
=
×
+1×
+
×
=（
+1+
）×
=2×
=
．
| 5 |
| 16 |
| 4 |
| 7 |
| 16 |
| 5 |
| 3 |
| 7 |
| 5 |
| 16 |
=
| 5 |
| 16 |
| 4 |
| 7 |
| 5 |
| 16 |
| 3 |
| 7 |
| 5 |
| 16 |
=（
| 4 |
| 7 |
| 3 |
| 7 |
| 5 |
| 16 |
=2×
| 5 |
| 16 |
=
| 5 |
| 8 |
点评：考查学生对乘法分配律的运用．
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