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230问答网 > 73×25+25×27简便计算公式怎样做四年级的题

73×25+25×27简便计算公式怎样做四年级的题

2024-12-31 13:52:16

推荐回答（5个）

回答1：

简便计算就是尽量把两个数乘完之后可以得到一个10的倍数等相对简单的数，比如说25乘以4，125乘以8，这两个乘积已经是固定模式，要记住，对于这道题呢，可以利用乘法结合律，也就是三个数相乘，先把前两个数相乘，再和另外一个数相乘，或先把后两个数相乘，再和另外一个数相乘，积不变，但是为了简化运算，需要把32拆成4乘以8。
32×125×25
=8×4×125×25
=8×125×(4×25)
=1000×100
=100000

回答2：

回答3：

回答4：

原式
=25×（73+27）
=25×100
=2500

回答5：

73×25+25×27
=(73+27)×25
=100×25
=2500

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