题目内容
99×
．
| 5 | 98 |
分析：把99=98+1，利用乘法分配律简算．
解答：解：99×
=（98+1）×
=98×
+1×
=5+
=5
．
| 5 |
| 98 |
=（98+1）×
| 5 |
| 98 |
=98×
| 5 |
| 98 |
| 5 |
| 98 |
=5+
| 5 |
| 98 |
=5
| 5 |
| 98 |
点评：此题考查乘法分配律在分数计算中的运用．
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