问题
填空题
a+b+c=a+(______+______);(a+b)×c=______×______+______×______.
答案
(1)a+b+c=a+(b+c);
(2)(a+b)×c=a×c+b×c;
故答案为:(1)b、c;(2)a、c、b、c.
a+b+c=a+(______+______);(a+b)×c=______×______+______×______.
(1)a+b+c=a+(b+c);
(2)(a+b)×c=a×c+b×c;
故答案为:(1)b、c;(2)a、c、b、c.