401x69-69的简便方法
答案:4 悬赏:80 手机版
解决时间 2021-11-24 23:32
- 提问者网友：捧腹剧
- 2021-11-24 20:06
401x69-69的简便方法
最佳答案
- 五星知识达人网友：独钓一江月
- 2021-11-24 20:26
401x69
=（401-1）x69
=400x69-1x69
=400x(70-1)-69
=400x70-400-（70-1）
=28000-400-70+1
=27600-70+1
=27530+1
=27531
谢谢，请采纳
=（401-1）x69
=400x69-1x69
=400x(70-1)-69
=400x70-400-（70-1）
=28000-400-70+1
=27600-70+1
=27530+1
=27531
谢谢，请采纳
全部回答
- 1楼网友：三千妖杀
- 2021-11-24 21:56
=69X（401-1）=27600
- 2楼网友：胯下狙击手
- 2021-11-24 20:54
401*69-69
=(401-1)*69
=400*69
=27600
=(401-1)*69
=400*69
=27600
- 3楼网友：天凉才是好个秋
- 2021-11-24 20:33
解原式
=（401-1）X69
=400x69
=400X(70-1)
=400x70-400
=28000-400
=27600
=（401-1）X69
=400x69
=400X(70-1)
=400x70-400
=28000-400
=27600
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