1000分之999乘1001用简便方法~~~要过程

Question

急急急！！！！！！！！！！！！

Answer 1

999/1000x1001
=999/1000x（1000+1）
=999+999/1000
=999+1-1/1000
=1000-1/1000
=99999/1000
希望对你有帮助

Answer 2

999/1000*1001
=999/1000*(1000+1)
=999+1/1000
=999又1/1000本回答被提问者采纳

Answer 3

999／1000×1001
＝999／1000×﹙1000＋1﹚
＝999／1000×1000＋999／1000
＝999＋999／1000
999
＝999 ———
1000