67×31 18×67 33×49的简便算法是什么?

2025-03-12 19:50:42
推荐回答(1个)
回答1:

简便计算
67×31 +18×67 +33×49
=67x(31+18)+33x49
=67x49+33x49
=(67+33)x49
=100x49
=4900