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230问答网 > 23ᠧ78 2ᠧ77ᠧ39简便方法？

23ᠧ78 2ᠧ77ᠧ39简便方法？

2025-02-11 13:26:32

推荐回答（5个）

回答1：

23✘78 2✘77✘39简便方法
解题思路：简便运算核心是运用加法和乘法各种定律进行计算，计算出整数部分方便后续计算的过程
解题过程：
23×78+2×77×39=
78×（23+77）=
78×100=7800
存疑请追问，满意请采纳

回答2：

你好，2×39就是78，所以可以提取一个78利用乘法分配律得到78×100，结果这是7800。

回答3：

23✘78+2✘77✘39
=79x(23+77)
=78x100
=7800
以上就是简便计算方法。

回答4：

23×78+2×77×39
=23×78+2×39×77
=23×78+78×77
=78×（23+77）
=78×100
=7800

回答5：

23X78+2X77X39
=23X78+77X(2X39)
=23X78+77X78
=(23+77)X78
=100X78
=7800

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