201×201–202×198简便运算

2025-04-28 09:57:52
推荐回答(1个)
回答1:

201×201–202×198
=201×201–(201+1)×198
=201×201–201×198-1×198
=201×(201–198)-198
=201×2-198
=402-200+2
=204