问题
解答题
用a、b、c、表示三个数,写出加法结合律______.
用a、b、c、表示三个数,写出乘法分配律______.
答案
(1)(a+b)+c=a+(b+c);
(2)(a+b)×c=a×c+b×c;
故答案为:(a+b)+c=a+(b+c),(a+b)×c=a×c+b×c;
用a、b、c、表示三个数,写出加法结合律______.
用a、b、c、表示三个数,写出乘法分配律______.
(1)(a+b)+c=a+(b+c);
(2)(a+b)×c=a×c+b×c;
故答案为:(a+b)+c=a+(b+c),(a+b)×c=a×c+b×c;
选择方框中的单词或词组填空。 | |
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