题目内容
75×4+4×25=（75+25）×4应用的是
- A.加法分配律
- B.乘法分配律
- C.乘法交换律
B
分析：75×4+4×25=（75+25）×4就是两个数与同一个数相乘，等于这两个数相加后再与第三个数相乘，是乘法分配律的反用．
解答：75×4+4×25=（75+25）×4是乘法分配律的反用．
故选：B．
点评：乘法分配律用字母表示就是：（a+b）×c=a×c+b×c，反过来也成立．
分析：75×4+4×25=（75+25）×4就是两个数与同一个数相乘，等于这两个数相加后再与第三个数相乘，是乘法分配律的反用．
解答：75×4+4×25=（75+25）×4是乘法分配律的反用．
故选：B．
点评：乘法分配律用字母表示就是：（a+b）×c=a×c+b×c，反过来也成立．
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