計算：1994x19931993 - 1992x19941994 = ？（不是只要答案，要列式哦！）
2005-11-18 15:09:12 · 3 個解答 · 發問者 Frank 7 in 科學 ➔ 數學
分開1994x10001x1993-1992x10001x1994
=1994x10001(1993-1992)
=1994X10001X1
=19941994
2005-11-18 15:37:26 · answer #1 · answered by 祥舉 2 · 0⤊ 0⤋
1994*19931993-1992*19941994=19931993(1993+1)-19941994(1993-1)=19931993*1993+19931993-19941994*1993+19941994=1993(19931993-19941994)+19931993+19941994=1993*(-1001)+19931993+19941994=-19931993+19931993+19941994=19941994
2005-11-18 15:42:21 · answer #2 · answered by Anonymous · 0⤊ 0⤋
1992×1994=(1993-1)×(1993+1)
=1993×1993 - 1
故1994x19931993-1992x19941994=
1994(1993×1993-1993×1993+1)=
1994
2005-11-18 15:41:47 · answer #3 · answered by ? 3 · 0⤊ 0⤋