456乘99的简便算法.急
问题描述:
456乘99的简便算法.急
答
列式:45600
- 456
---------------
45144
答
456×99
=456×100-456
=45600-456
=45144
答
456×99
=456×(100-1)
=456×100-456
=45600-456
=45144
答
456*100-456=45144