题目内容
1.25×8.8=1.25×8+1.25×0.8是运用了
- A.乘法交换律
- B.乘法结合律
- C.乘法分配律
C
分析:1.25×8.8转化为1.25×8+1.25×0.8,是运用乘法分配律进行简算,(a+b)c=ac+bc,由此解答.
解答:1.25×8.8,
=1.25×(8+0.8),
=1.25×8+1.25×0.8,
=10+1,
=11;
所以这是运用了乘法分配律进行简算.
故选:C.
点评:此题考查目的是理解和掌握乘法分配律的意义.
分析:1.25×8.8转化为1.25×8+1.25×0.8,是运用乘法分配律进行简算,(a+b)c=ac+bc,由此解答.
解答:1.25×8.8,
=1.25×(8+0.8),
=1.25×8+1.25×0.8,
=10+1,
=11;
所以这是运用了乘法分配律进行简算.
故选:C.
点评:此题考查目的是理解和掌握乘法分配律的意义.
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