2010*1999-2000^2等于多少
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2010*1999-2000^2等于多少
![2010*1999-2000^2等于多少](/uploads/image/z/19832120-8-0.jpg?t=2010%2A1999-2000%5E2%E7%AD%89%E4%BA%8E%E5%A4%9A%E5%B0%91)
= 2010 * (2000 -1) - 2000 * 2000
= 2010*2000 - 2010 - 2000 * 2000
= (2010 - 2000)*2000 - 2010
= 10*2000 -2010
= 20000 - 2010
= 17990
= 2010*2000 - 2010 - 2000 * 2000
= (2010 - 2000)*2000 - 2010
= 10*2000 -2010
= 20000 - 2010
= 17990