题目内容
25×13=13×25是根据（ ）变化的．
分析：因为乘法交换律用字母表示为a×b=b×a 两个数相乘，交换加数的位置，积不变．25×13=13×25符合a×b=b×a的形式，因此25×13=13×25是根据乘法交换律变化的．
解答：解：25×13=13×25是根据乘法交换律变化的；
故选：C．
故选：C．
点评：此题考查了学生对乘法交换律的掌握情况．
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