4×(數(shù)學(xué)公式+數(shù)學(xué)公式)=4×數(shù)學(xué)公式+4×數(shù)學(xué)公式運用了


  1. A.
    加法結(jié)合律
  2. B.
    乘法結(jié)合律
  3. C.
    乘法分配律
C
分析:乘法分配律為:兩個數(shù)相加再乘另一個數(shù),等于把這個數(shù)分別與兩個加數(shù)相乘,再把兩個積相加,得數(shù)不變.用字母表示為:(a±b)×c=a×c±b×c.由此可知,4×(+)=4×+4×運用了乘法分配律.
解答:根據(jù)乘法分配律的定義可知,
4×(+)=4×+4×運用了乘法分配律.
故選:C.
點評:本題考查的知識點為:乘法分配律的意義:(a±b)×c=a×c±b×c.
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