1.9+19.9+199.9+1999.9+19999.9用简便方法算
答案:6 悬赏:80 手机版
解决时间 2021-11-28 00:26
- 提问者网友:龅牙恐龙妹
- 2021-11-27 20:14
1.9+19.9+199.9+1999.9+19999.9用简便方法算
最佳答案
- 五星知识达人网友:千杯敬自由
- 2021-11-27 21:54
1.9+19.9+199.9+1999.9+19999.9
=2+20+200+2000+20000-0.5
=22222-0.5
=22221.5
=2+20+200+2000+20000-0.5
=22222-0.5
=22221.5
全部回答
- 1楼网友:往事埋风中
- 2021-11-28 00:21
2+20+200+2000+20000-0.1*5
- 2楼网友:污到你湿
- 2021-11-27 23:23
1.9+19.9+199.9+1999.9+19999.9
=(2-0.1)+(20-0.1)+(200-0.1)+(2000-0.1)+(20000-0.1)
=2+20+200+2000+20000-0.5
=22222-0.5
=22221.5
=(2-0.1)+(20-0.1)+(200-0.1)+(2000-0.1)+(20000-0.1)
=2+20+200+2000+20000-0.5
=22222-0.5
=22221.5
- 3楼网友:等灯
- 2021-11-27 23:02
1.9+19.9+199.9+1999.9+19999.9
=2+20+200+2000+20000-0.5
=22222-0.5
=22221.5
=2+20+200+2000+20000-0.5
=22222-0.5
=22221.5
- 4楼网友:归鹤鸣
- 2021-11-27 22:29
2+20+200+2000+20000-0.1*5=22222-0.5=22221.5
- 5楼网友:执傲
- 2021-11-27 22:18
简算方法计算如下:
1.9+19.9+199.9+1999.9+19999.9
=2+20+200+2000+20000-0.5
=22222-0.5
=22221.5
1.9+19.9+199.9+1999.9+19999.9
=2+20+200+2000+20000-0.5
=22222-0.5
=22221.5
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