啊,是+的啊,记得我考的那张就是+的.......要是+的怎么做啊
问题认真看看吧
1994 X 19951995 + 1995 X 19941994
= 1994 X (1995X10001) + 1995 X (1994X10001)
= 1994 X1995 X10001 + 1995 X1994 X10001
= 2X 1994X 1995X 10001
或者
= 1994 X (1995 0000+ 1995) + 1995 X (1994 0000+ 1994)
= 1994X 1995 0000 + 1994 X 1995 + 1995X 1994 0000 + 1995 X 1994
= 2X 1994X 1995X 10000 + 2X 1994X 1995
= 2X 1994X 1995X 10001
1994 X 19951995 + 1995 X 19941994
= 1994 X (1995X10001) + 1995 X (1994X10001)
= 1994 X1995 X10001 + 1995 X1994 X10001
= 2X 1994X 1995X 10001
或者
= 1994 X (1995 0000+ 1995) + 1995 X (1994 0000+ 1994)
= 1994X 1995 0000 + 1994 X 1995 + 1995X 1994 0000 + 1995 X 1994
= 2X 1994X 1995X 10000 + 2X 1994X 1995
= 2X 1994X 1995X 10001
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第1个回答 2010-12-23
错了，中间是-
1994*19951995-1995*19941994
=1994*1995*10001-1995*1994*10001
=1994*1995*10001-1994*1995*10001
=0来自：求助得到的回答
1994*19951995-1995*19941994
=1994*1995*10001-1995*1994*10001
=1994*1995*10001-1994*1995*10001
=0来自：求助得到的回答
第1个回答 2010-12-23
=1995x19941995-19941994+1995x19941994
=19941995x(1995+1995)-19941994
=19941995x3990-19941994
=19941994x3990-19941994+3990
=sb
=19941995x(1995+1995)-19941994
=19941995x3990-19941994
=19941994x3990-19941994+3990
=sb
第2个回答 2010-12-23
有解答了
