计算:1989×19901990-1990×19891989=______.
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计算:1989×19901990-1990×19891989=______.
![计算:1989×19901990-1990×19891989=______.](/uploads/image/z/16310258-26-8.jpg?t=%E8%AE%A1%E7%AE%97%EF%BC%9A1989%C3%9719901990-1990%C3%9719891989%3D______%EF%BC%8E)
根据题意可得:
1989×19901990-1990×19891989,
=1989×(1990×10001)-1990×(1989×10001),
=(1989×1990-1990×1989)×10001,
=0.
故答案为:0.
1989×19901990-1990×19891989,
=1989×(1990×10001)-1990×(1989×10001),
=(1989×1990-1990×1989)×10001,
=0.
故答案为:0.
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