1.19971997x1996-19961996x1997=?
2.10001x1123=?
Maths
2006-10-18 6:02 am
回答 (2)
2006-10-18 6:11 am
✔ 最佳答案
1. 19971997 x 1996 - 1996 1996 x 1997= (19970000 + 1997) x 1996 - (19961996) x 1997
= (1997 * 10000 + 1997) x 1996 - (1996 * 10000 + 1996) x 1997
= 1997 * 10001 * 1996 - 1996 * 10001 * 1997
= 0
2. 10001 * 1123
= (10000 + 1) * 1123
= 11230000 + 1123
= 11231123
2006-10-18 6:16 am
先作答第2題:
10001 x 1123
= (10000+1) x 1123
= 10000 x 1123 + 1 x 1123
= 11230000 + 1123
= 11231123 #
回到第1題:
19971997 x 1996 - 19961996 x 1997
= 19971997 x 1996 - 19961996 x (1996 + 1)
= 19971997 x 1996 - 19961996 x 1996 - 19961996 x 1
= 1996 x ( 19971997 - 19961996) - 19961996
= 1996 x 10001 - 19961996
(看以上第2題為提示)
= 19961996 -19961996
= 0 #
10001 x 1123
= (10000+1) x 1123
= 10000 x 1123 + 1 x 1123
= 11230000 + 1123
= 11231123 #
回到第1題:
19971997 x 1996 - 19961996 x 1997
= 19971997 x 1996 - 19961996 x (1996 + 1)
= 19971997 x 1996 - 19961996 x 1996 - 19961996 x 1
= 1996 x ( 19971997 - 19961996) - 19961996
= 1996 x 10001 - 19961996
(看以上第2題為提示)
= 19961996 -19961996
= 0 #
參考: 自己
收錄日期: 2021-04-13 14:22:56
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061017000051KK04758