396+397+398+399+340+341+342+343+344用巧算怎么算
答案:5 悬赏:50 手机版
解决时间 2021-11-22 00:37
- 提问者网友:不爱我么
- 2021-11-21 16:42
396+397+398+399+340+341+342+343+344用巧算怎么算
最佳答案
- 五星知识达人网友:野慌
- 2021-11-21 17:32
396+397+398+399+340+341+342+343+344
=(396+344)+(397+343)+(398+342)+(399+341)+340
=740+740+740+740+340
=(700+40)+(700+40)+(700+40)+(700+40)+(300+40)
=700×4+40×5+300
=2800+200+300
=3000+300
=3300
=(396+344)+(397+343)+(398+342)+(399+341)+340
=740+740+740+740+340
=(700+40)+(700+40)+(700+40)+(700+40)+(300+40)
=700×4+40×5+300
=2800+200+300
=3000+300
=3300
全部回答
- 1楼网友:不如潦草
- 2021-11-21 21:26
396+397+398+399+340+341+342+343+344
=(396+344)*4+340
=740*4+340
=2960+340
=3300
=(396+344)*4+340
=740*4+340
=2960+340
=3300
- 2楼网友:话散在刀尖上
- 2021-11-21 20:15
解答:
396+397+398+399+340+341+342+343+344
=396+397+398+399+340+340+1+340+2+340+3+340+4
=(396+4)+(397+3)+(398+2)+(399+1)+340x5
=400+400+400+400+340x5
=400x4+340x5
=1600+1700
=3300
- 3楼网友:神鬼未生
- 2021-11-21 19:06
396+397+398+399+340+341+342+343+344=4*740+340=2960+340=3300
因为396+344=397+343+398+342=399+341=740
所以原式=740*4+340
因为396+344=397+343+398+342=399+341=740
所以原式=740*4+340
- 4楼网友:怀裏藏嬌
- 2021-11-21 17:45
解:原式=396+344+397+343+398+342+399+341+340=740x4+340=3300
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