三年级数学下册除法估算练习题.docx

三年级数学下册除法估算练习题.docx

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三年级数学下册除法估算练习题

估算一

653÷7≈         916÷3≈         870÷4≈          716÷5≈

180÷6≈         780÷3≈         805÷2≈          248÷8≈

246÷7≈        320÷5≈          103÷3≈         213÷3≈

174÷9≈        197÷3≈          352÷5≈         296÷4≈

160÷5≈        220÷9≈         153÷5≈         357÷6≈

164÷2≈         148÷8≈          446÷8≈         911÷9≈

405÷7≈        176÷8≈           325÷4≈         155÷4≈

218÷6≈        350÷8≈          801÷6≈         220÷9≈

218÷4≈        354÷5≈          602÷8≈         251÷3≈

估算二

510÷6≈        377÷6≈          192÷7≈         330÷4≈

175÷5≈         225÷3≈          415÷5≈         474÷5≈

740÷8≈        500÷6≈           200÷7≈         121÷4≈

375÷5≈        292÷3≈          638÷8≈         227÷3≈

441÷5≈        212÷7≈          604÷4≈         260÷4≈

375÷9≈        600÷8≈           468÷5≈         357÷6≈

246÷3≈        194÷8≈          516÷6≈         500÷8≈

432÷8≈         125÷5≈          150÷4≈         453÷6≈

205÷3≈        521÷7≈          440÷5≈         870÷9≈

估算三

352÷5≈        429÷8≈          524÷8≈         594÷7≈

197÷3≈         287÷4≈           220÷3≈         512÷8≈

103÷3≈        444÷6≈          210÷4≈         645÷8≈

566÷7≈        728÷8≈          370÷7≈         520÷6≈

519÷6≈        388÷4≈           706÷9≈         254÷3≈

728÷8≈        83÷5≈           190÷6≈         396÷4≈

308÷7≈        427÷5≈          598÷8≈          569÷6≈

190÷2≈         432÷8≈          368÷5≈         451÷9≈

804÷9≈        541÷9≈          557÷8≈         473÷5≈

估算四

315÷7≈       245÷3≈           726÷9≈          554÷8≈

500÷6≈       298÷7≈           267÷7≈          716÷9≈

521÷5≈       232÷4≈          285÷6≈          267÷3≈

167÷3≈        434÷8≈          375÷8≈          567÷9≈

369÷4≈       498÷7≈          197÷3≈          874÷9≈

483÷8≈       320÷8≈          408÷9≈          490÷6≈

248÷8≈        368÷5≈          508÷6≈          380÷6≈

592÷9≈       796÷9≈          148÷4≈          500÷9≈

247÷9≈       460÷5≈          347÷5≈          352÷4≈

脱式计算

（390+30）÷7        2340÷5÷3            2065+4675÷5 

396÷3÷2       25×8÷4         985-168÷4        

648+480÷3124-735÷7     （34＋22）÷8      

45÷（15÷3）    （601－246）÷5205＋7×8 

62-（25-7）       32×4＋72           305×3-154

523+248-475       470÷5-28         459÷9÷7       

294＋399÷7 78÷3÷5684+207÷3 140÷5÷2＝

64＋396÷3＝56×8÷7  366÷（54÷9）

用竖式计算并验算

348÷3=           398÷7=         365÷5=         380÷6=

724÷4=          628÷3=          912÷3=         735÷9=

309÷3=        750÷5=           608÷3=        860÷2=

270÷6=           105÷7=          208÷8=         204÷2=