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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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1

1??????????????88???244????????????

?????????????????????????????????????????????.???????????????????2442=122???.?122??????????????????????????.???122?????88??????????122-88=34??34???.?????54?.

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????88??????????488????244???? 884-244=108???.????????4-2??????????884-244??4-2?= 54???.???????88??????54?????.???.??????????=???????-????????-????.

??????????88??????????288=176?????244????244-176=68???.??????????4-2????682=34???.?????????34??????????????=????-???????????-????.

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2

?????0.19???????0.11?????????16????2.80?.???????????

??????????.?????????11????????19???????16???280??.

?????????????????????.???????????????=?1916-280??19-11?=248=3???.???=16-3=13???. ????13?????3????.

????????????????????????.?2????19?11???30.???????16???8?????8??????????????8?11+19?=240.?280?40.40?19-11?=5.???????8????5?????????????3?308?1916?1116??????.??????????????????.

????????????????????.?????16??????10????6?????1910+116=256.?280?24.24?19-11?=3??????6?????3?. ???????????????????????????.

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3

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?????????????30??30?6?10?????????????306=5?????????3010=3???.

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????????7.?????5??????3?????30???????????????.??????? ??=?30-37??5-3?=4.5???=7-4.5=2.5?????????4.5????????2.5??.

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???1998????????????78?????????17?.????2002????????????4????????????3?.?????????????3??????????

??4???????????8.?????????17+8=25????????78+8=86.????????????????????????.25????.86????.???????????254-86??4-3?=14???.1998??????14-4=10???.?????25-14?4-4=40???.??????????????3?????????40-10??3-1?=15???.??2003?.

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???8??????6???2??????6???1???.????????18???118???20???.???????? ??????????6?????????????????????8???6????.?????????8??? ???=?118-618??8-6?=5???.?????6??????18-5=13???.?????????13??????20???.?????????=?132-20??2-1?=6???.??????13-6=7???. ???5????7????6??.

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?????????????52???????181???????????1?????1???7??5?????6????2??3????????????4????????? ???2??3??4??????52-7-6=39???.????? 181-17-56=144???.???2??3?????????????????????2.5??????2+3?2=2.5?.?????=4????=2.5????=144????=39.?4?????144-2.539??4-1.5?=31???.

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3.56??????????10????????????6?????4???????????

4.??????????????16?????????11???????17?????222??????????????

5.???????????5???????30????75???????????????????225????????????????????

6.?????????????29???92?????????????

7.15???50????20????63????20????50?????????

8.????????????100??????????3????????3???1?????100????????????????

9.??????????30????200????5???????7???????6?????????????

10.??????21???????4??5??????5????????????100????????5??

11.????2000??????????????????5?????????????????40???????????????9190?????????

12.20??50?????36????9?9???????????????

13.??????400????????????????7???????4??????????70????????????

14.???????????500????????????????????5??????????????18????????9931???????????????????

15.??????????????20????????12?????????112?????????14????????????????

16.???????30????????112???????????5???????????3?????????????

17.????????50??????????4???????????2????????????120???????????????

18.?????????????20???????????20???????12???????????240??????????????

19.?????????????????720?????????????????????????????20??6????8???????????????????????????????????????????

20????8??????6???2??????6???????????????16????110???14??????????????

21???1000???????????1??????3?????1?????????????5???????????260?????????????????

22???????????360??????5???????????????????50???????????1250???????????

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1??????????????????35????????94?????????

2??????20???44?????????

3????????20???????????????5???????????1??????????????64????????????

4?12????????34????????????????????????

5??????41??????????????10????????6???????4?????????????

6???????????2??5??????65??????205???????????????

7?????????????????????????????

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8????????????500????????????????????5??????????????18????????9931???????????????????

9????????? 220???????? 20????????????14???????9??????9??????????

10?100???140??????1??3??????1??1????????????????

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1. ???????20???????????????5???????????1??????????????64???????????? ??????

205=100???

100?64=36???

36?5+1?=6?????

20?6=14?????

2. ??????100??????????????????86????????????

100?86=14???

142=7????

100?74=72???

72?2+4?=12????1???1?1??

??7+12=19???

??12?

3. ???????? 220???????? 20????????????14???????9??????9??????????

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920=180????

220-180=40????

40?14-9?=8???14????

20-8=12???9????

4. ?????????????????2??18??????? 182=9????

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5????????20???????5????????1?????0??????76?????????

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520=100???

100-76=24???

24?5+1?=4?????

20-4=16?????

??????????????20?????????100????????76??????24?????????????????????????????????????????????6?????????????????????5?????????5????????????????1?????6???1?????????6???????24???????????246=4?

6. 12????????34????????????????????????

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122=24???

34-24=10???

10?4-2?=5?????

12-5=7?????

7??????100??????????80??????????? 100-802=60???

603=20???

??40+220=80???

??20?

8?????????3???135????????5????????7???????????

135+5+7=147???

1473=49????2??

49-5=44????1??

49-7=42????3??

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9??????41??????????????10????????6???????4?????????????

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410=40???

41-40=1???

10-1=9????? 1???

10?????20???44????????

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202=40???

44-40=4???

4?4-2?=2????

20-2=18????

11???????????26?????274?????????? 274-262=222???

222?2+4?=37???

37+26=63????

63-26=37????

12??????????????????180?????????5???????3??????????4?????????????? 180-34=168???

168?5+3?=21???

21+4=25?????

???21?


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