题目内容
(-5)×6×(-| 4 |
| 5 |
| 1 |
| 4 |
分析：用乘法结合律较简单．
解答：解：原式=（-5）×6×[（-
）×
]
=（-5）×（-
）×6
=（-5）×（-
）×6
=1×6
=6．
| 4 |
| 5 |
| 1 |
| 4 |
=（-5）×（-
| 1 |
| 5 |
=（-5）×（-
| 1 |
| 5 |
=1×6
=6．
点评：本题考查了乘法结合律的灵活运用，需同学们熟练掌握．
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(-5)×6×(-| 4 |
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