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发表于 2019-9-13 23:46:11 | 显示全部楼层 |阅读模式
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30

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38???????????360?????1840????????????200?????????????????? 41?????????5??4?2??8?1

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2014

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????????????100????(????)

?????????100???? ??????

1. 76521327?76532727

????=76527(213+327)= 76527540=76520=15300

2. (9999?9997???9001)-(1?3???999)

????=?9999-999?+?9997-997?+?9995-995?+??+(9001-1)

=9000+9000+??.+9000 (500?9000)

=4500000

3?1998199919991998-1998199819991999

???19981998+1?19991998-1998199819991999

=1998199819991998-1998199819991999+19991998

=19991998-19981998

=10000

4?(873477-198)(476874?199)

??873477-198=476874?199

????=1

5?20001999-19991998?19981997-19971996???21

?????1999?2000?1998??1997?1998?1996???

?3?4?2??21

??1999?1997???3?1?2?2000000?

6?297?293?289???209

???209+297?*23/2=5819

7????

????=?3/2?*?4/3?*?5/4?*?*(100/99)*(1/2)*(2/3)*(3/4)*?*(98/99)

=50*(1/99)=50/99

8.

????=?1*2*3?/(2*3*4)=1/4

9. ?7??????????18??????????6???????19????????????5???????20????????????

?? 7*18-6*19=126-114=12

6*19-5*20=114-100=14

???????12?14??????12*14=168

10. ????????????????? 30??????????28??????????33???????

??283?335-307=39?

11. ????????9?????63?????????11?????????????8????????????

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12??????????????????????????????2???????????2??????????????????3????????????????

????????????????????4???????????4????????????????????8????????????????????9????????????9?8=1????

13. ???4??????????? 5??????????????????????????(?????)

???20??9??9207=3.15????

14. ???????????????13?7???????????????????

??????7?????????132?26???

???????????26+7?/3=11???

?????????????????11?7?

15. ???????????????????????76??????????70?????????????88??????????????????????74?????????????????

??????88?????????????????????????88-74?14???????????????76?74=2??????????142?7?????????????????

746-705?94????

16. ?????????????????4.5?????????????????5.5????????????????????????????4.5????????????????5.5??????????????????????

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17. ???A??B???3????B??A???4???A??????????????B??????

???????3?????4???????????4?3?1????????3?4?7???????????7?????????3????????3?37?24???????????A???B??24??

18. ??????????????????????52???????70????????A?????????4???????????????90???????A???????????????????

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?52?70?18?2196????

19. ???????????????????????????????????4????????????????1??????3????????????????

??????1?????3????6????6????????????1???????????????64?24????

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??????????????????????????????24???????????????24???24???????

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21. ???????????A?B????????????????????1.5???????????C???????5?00?16?00???????????

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22. ????????????????????280????????385???????????????????11?????????????????????????

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?????????100????

1. 76521327?76532727

????=76527(213+327)= 76527540=76520=15300

2. (9999?9997??9001)-(1?3??999)

????=?9999-999?+?9997-997?+?9995-995?++(9001-1)

=9000+9000+.+9000 (500?9000)

=4500000

3?1998199919991998-1998199819991999

???19981998+1?19991998-1998199819991999

=1998199819991998-1998199819991999+19991998

=19991998-19981998

=10000

4?(873477-198)(476874?199)

??873477-198=476874?199

????=1

5?20001999-19991998?19981997-19971996???21

?????1999?2000?1998??1997?1998?1996???

?3?4?2??21

??1999?1997???3?1?2?2000000?

6?297?293?289???209

???209+297?*23/2=5819

7????

????=?3/2?*?4/3?*?5/4?*?*(100/99)*(1/2)*(2/3)*(3/4)*?*(98/99)=50*(1/99)=50/99 8.

????=?1*2*3?/(2*3*4)=1/4

9. ?7??????????18??????????6???????19????????????5???????20????????????

?? 7*18-6*19=126-114=12

6*19-5*20=114-100=14

???????12?14??????12*14=168

10. ????????????????? 30??????????28??????????33???????

??283?335-307=39?

11. ????????9?????63?????????11?????????????8????????????

???????x????63?11x=8?9+x????x=3?

12??????????????????????????????2???????????2??????????????????3???????????????? ????????????????????4???????????4????????????????????8????????????????????9????????????9?8=1????

13. ???4??????????? 5??????????????????????????(?????)

???20??9??9207=3.15????

14. ???????????????13?7??????????????????? ??????7?????????132?26???

???????????26+7?/3=11???

?????????????????11?7?

15. ???????????????????????76??????????70?????????????88??????????????????????74?????????????????

??????88?????????????????????????88-74?14???????????????76?74=2??????????142?7?????????????????

746-705?94????

16. ?????????????????4.5?????????????????5.5????????????????????????????4.5????????????????5.5??????????????????????

???????????????????????????????????????????????????????????

17. ???A??B???3????B??A???4???A??????????????B??????

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18. ??????????????????????52???????70????????A?????????4???????????????90???????A???????????????????

?????????????????????????????????????????????????????4???

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??????????14?????????18????????

?52?70?18?2196????

19. ???????????????????????????????????

4????????????????1??????3????????????????

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20. ??????400?????????????????????????????????????????2????????????2????????24????????????????

??????????????????????????????24???????????????24???24???????

???????x??????????x?2??????????????24????400?????24x?24?x?2??400???x=7?1/3??

21. ???????????A?B????????????????????

1.5???????????C???????5?00?16?00???????????

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22. ????????????????????280????????385???????????????????11?????????????????????????

?????????????????????????????????????????????????????????11

23. ????????????????10?????5????????????2?????4??????????????????

????????10/5=2

?????4+2??4=6?4

??????6??????4??

24???????????A?B??????B????B??20????B??40??????B????B??24????

?1? A? B??????

?2?????A??B?24????????????

?????1?????20??????40-24?16

????????

25. ???????????????????????????????3????10???????????????20????????????????????????????????????????????????

??????a???????b??????????3b????????????????????????

10?a?b??20?a?3b??

??a?5b??????????5?????10??????2?????

10?????????????8??????

26. ??????80??????????? 8?????????3?????4????????9??????????????????

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27. ???????????????????????????????????????????????18??2????15??????????

?1??????????????

?2???????????????????????????

???1???????a?????????b

?????????

?

?????11??

?2??????????????????135??????????

135011=1485???????????135???????????????1485?135?2?675????

28. ?????????????????20?????????????1??

?????????100?????????30????????????1??????????????


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