题目内容
（
×
）×
=
×（
×
）=
．
| 1 |
| 4 |
| 9 |
| 8 |
| 10 |
| 9 |
| 1 |
| 4 |
| 1 |
| 4 |
| 9 |
| 8 |
| 9 |
| 8 |
| 10 |
| 9 |
| 10 |
| 9 |
| 5 |
| 16 |
| 5 |
| 16 |
分析：（
×
）×
，运用乘法结合律简算．
| 1 |
| 4 |
| 9 |
| 8 |
| 10 |
| 9 |
解答：解：（
×
）×
=
×(
×
)
=
×
=
；
故答案为：
、
、
、
．
| 1 |
| 4 |
| 9 |
| 8 |
| 10 |
| 9 |
=
| 1 |
| 4 |
| 9 |
| 8 |
| 10 |
| 9 |
=
| 1 |
| 4 |
| 5 |
| 4 |
=
| 5 |
| 16 |
故答案为：
| 1 |
| 4 |
| 9 |
| 8 |
| 10 |
| 9 |
| 5 |
| 16 |
点评：此题考查的目的是理解掌握乘法结合律，并且能够灵活运用乘法结合律进行简便计算．
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