2004.05×1997.05-2001.05×1999.05怎么算
答案:1 悬赏:30 手机版
解决时间 2021-11-08 23:38
- 提问者网友：斑駁影
- 2021-11-08 09:19
2004.05×1997.05-2001.05×1999.05怎么算
最佳答案
- 五星知识达人网友：妄饮晩冬酒
- 2021-11-08 09:26
先把式子简化成：
（2000+4.05）x(2000-2.95)-(2000+1.05)x(2000-0.95)
=2000x2000-2000x2.95+2000x4.05-4.05x2.95-{2000x2000-0.95x2000+1.05x2000-1.05x0.95}
= -2000x2.95+0.95x2000+2000x4.05-1.05x2000+1.05x0.95-4.05x2.95
= -2000x2-2000x0.95+0.95x2000+3x2000+1.05x0.95-{(3+1.05)x(2+0.95)}
= -4000+6000+1.05x0.95-{6+3x0.95+2x1.05+1.05x0.95}
=2000+1.05x0.95-6-3x0.95-2x1.05-1.05x0.95
=1994-4.95
=1989.05
（2000+4.05）x(2000-2.95)-(2000+1.05)x(2000-0.95)
=2000x2000-2000x2.95+2000x4.05-4.05x2.95-{2000x2000-0.95x2000+1.05x2000-1.05x0.95}
= -2000x2.95+0.95x2000+2000x4.05-1.05x2000+1.05x0.95-4.05x2.95
= -2000x2-2000x0.95+0.95x2000+3x2000+1.05x0.95-{(3+1.05)x(2+0.95)}
= -4000+6000+1.05x0.95-{6+3x0.95+2x1.05+1.05x0.95}
=2000+1.05x0.95-6-3x0.95-2x1.05-1.05x0.95
=1994-4.95
=1989.05
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