题目内容
24×5×75×5=(24+75)×5.
错误
分析:先运用乘法结合律解答等式左边的算式,再把等式右边的算式运用乘法分配律解答,两者比较即可解答.
解答:等式左边:
24×5×75×5,
=(24×5)×(75×5),
=120×375,
=45000,
等式右边:
(24+75)×5,
=24×5+75×5,
=120+375,
=495,
45000>495.
故应填:×.
点评:正确运用乘法简便算法解决问题是本题考查知识点.
分析:先运用乘法结合律解答等式左边的算式,再把等式右边的算式运用乘法分配律解答,两者比较即可解答.
解答:等式左边:
24×5×75×5,
=(24×5)×(75×5),
=120×375,
=45000,
等式右边:
(24+75)×5,
=24×5+75×5,
=120+375,
=495,
45000>495.
故应填:×.
点评:正确运用乘法简便算法解决问题是本题考查知识点.
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