盗墓笔记通灵周穆王:20022003乘20032002减20022002乘20032003
来源:百度文库 编辑:神马品牌网 时间:2024/05/10 11:41:00
怎样求这题的简便运算
20022003x20032002-20022002x20032003
=(20022002+1)x20032002-20022002x(20032002+1)
=20022002x20032002+20032002-20022002x20032002-20022002
=20032002-20022002
=10000
=(20022002+1)x20032002-20022002x(20032002+1)
=20022002x20032002+20032002-20022002x20032002-20022002
=20032002-20022002
=10000