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人教版三年级数学下册
专题训练《一位数除两、三位数的估算》
练习题（附答案）
1.估算。
导学点晴：一位数除三位数的估算:除数不变,把三位数看成几百几十或整百的数,再用口算除法的方法计算。
2.连一连。
(下面各题的商接近几十)
导学点晴：想一位数乘几百或几十最接近或等于被除数的最高位上的数或前两位上的数,几百或几十就是所要估算的商。
3.填序号。
①648÷8 ②253÷5 ③98÷2 ④712÷9
⑤340÷7 ⑥185÷6 ⑦396÷5 ⑧548÷6
(1)商接近50的有( )。
(2)商接近80的有( )。
导学点晴：在估算时,商越接近准确值越好。
4.填表。
导学点晴：估算的结果可以大于准确值,也可以小于准确值。
参考答案：
1.30 50 90 30 80 80 90 40 20
2.
3.(1)②③⑤(2)①④⑦
4.两60 61 三300 302 两90 88 两 70 71 两70 69……5 两70 66。
三年级数学下册除法估算练习题一个旅行团有32人，想租船过河，如果每条船最多可乘6人，那么至少需要租几条船？小明的妈妈买了28个苹果，家里有8个人，小明想知道需要几个大碗来装这些苹果，每个大碗最多装4个苹果。
请帮小明算一算需要多少个大碗。
估算47÷8的商大约是几十多。
我们有20个苹果，要分给5个人，每个人能得到几个苹果？一共有24只小鸡，有8个笼子，每个笼子里有几只小鸡？我们有12个气球，分给3个人，每个人能得到几个气球？我们有9个桃子，要分给3个人，每个人能得到几个桃子？学校里有90名学生，分成15组进行课外活动，每组有多少名学生？每组有多少名学生？一共有24本书，分给6个人，每个人能得到几本书？一共有24个橘子，要分给8个人，每个人能得到几个橘子？我们有18个苹果，要分给3个人，每个人能得到几个苹果？我们有15个气球，要分给5个人，每个人能得到几个气球？答：每个人能得到 3个气球。
（1）15○20＝35 （2）40○8＝5 （3）6○4＝20 （4）70○9＝61小红有20元钱，买了3支铅笔，每支铅笔的价格是2元，小红还剩下（）元钱。
一本书有48页，如果每天看6页，要看（）天。
老师今年45岁，学生今年9岁，老师和学生相差（）岁。
我们有一些大小相同的正方形纸片，每张纸片的面积是156平方厘米，用这些纸片可以拼成一个面积是（）平方厘米的正方形。
（1）一个鸡蛋的重量是50（）；（2）一辆汽车的载重量是5000（）；（3）一节课的时间是40（）；（4）一个铅球的重量是5（）。
一辆汽车每小时行驶的路程是60千米，如果行驶了3小时，一共行驶了（）千米。
一个正方形的边长是8厘米，它的面积是（）平方厘米。
一个长方形的长是12厘米，宽是8厘米，它的面积是（）平方厘米。
一个圆的半径是6厘米，它的面积是（）平方厘米。
一个三角形的底边长是6厘米，高是4厘米，它的面积是（）平方厘米。
A.平行四边形B.长方形C.圆形D.正方形A.三角形B.长方形C.圆形D.正方形A.长方形B.圆形C.正方形D.平行四边形A.长方形B.正方形C.圆形D.三角形下面的图形中，不是正方体展开图的是（）。
三年级数学下册除法估算练习题编辑整理：尊敬的读者朋友们：这里是精品文档编辑中心，本文档内容是由我和我的同事精心编辑整理后发布的，发布之前我们对文中内容进行仔细校对，但是难免会有疏漏的地方，但是任然希望（三年级数学下册除法估算练习题）的内容能够给您的工作和学习带来便利。
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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÷5396÷3÷ 2 25×8÷4 985—168÷4648+480÷3 124—735÷7 （34＋22）÷845÷（15÷3）(601－246）÷5 205＋7×862-（25—7）32×4＋72 305×3-154523+248—475 470÷5-28 459÷9÷7294＋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=三年级数学下册除法估算练习题724÷4= 628÷3= 912÷3= 735÷9=309÷3= 750÷5= 608÷3= 860÷2=270÷6= 105÷7= 208÷8= 204÷2=11。
完整)三年级数学下册除法估算练习题XXX 1:653 divided by 7 is approximately 93.916 divided by 3 is approximately 305.870 divided by 4 is approximately 218.716 divided by 5 is approximately 143.180 divided by 6 is approximately 30.780 divided by 3 is approximately 260.805 divided by 2 is approximately 402.248 divided by 8 is approximately 31.246 divided by 7 is approximately 35.174 divided by 9 is approximately 19.160 divided by 5 is approximately 32.164 divided by 2 XXX divided by 7 is approximately 58.218 divided by 6 is approximately 36.218 divided by 4 XXX divided by 5 is approximately 64.97 divided by 3 is approximately 32.220 divided by 9 XXX 148 divided by 8 is approximately 19.76 divided by 8 is approximately 10.350 divided by 8 XXX divided by 5 XXX divided by 3 is approximately34.352 divided by 5 is approximately 70.153 divided by 5 is approximately 31.446 divided by 8 is approximately 56.325 divided by 4 is approximately 81.801 divided by 6 is approximately 134.602 divided by 8 is approximately 75.213divided by 3 XXX divided by 4 is approximately 74.357 divided by 6 is approximately 60.911 divided by 9 XXX divided by 4 is approximately 39.220 divided by 9 is approximately 24.251 divided by 3 is approximately 84.XXX 2:510 divided by 6 is approximately 85.377 divided by 6 is approximately 63.192 divided by 7 is approximately 27.330 divided by 4 XXX divided by 5 is approximately 35.225 divided by 3 is approximately 75.415 divided by 5 is approximately 83.474 divided by 5 is approximately 95.740 divided by 8 is approximately 92.375 divided by 5 is approximately 75.441 divided by 5 is approximately 88.375 divided by 9 is approximately 42.246 divided by 3 XXX divided by 8 is approximately 54.205 divided by 3 is approximately 68.500 divided by 6 is approximately 83.292 divided by 3 is approximately 97.212 divided by 7 is approximately 30.600 divided by 8 is approximately 75.194 divided by 8 XXX divided by 5 is approximately 25.521 divided by 7 XXX divided by 7 is approximately 29.638 divided by 8 is approximately 80.604divided by 4 is approximately 151.468 divided by 5 is approximately 94.516 divided by 6 is approximately 86.150 divided by 4 XXX divided by 5 is approximately 88.121 divided by 4 is approximately 30.227 divided by 3 XXX divided by 4 XXX divided by 6 is approximately 60.500 divided by 8 XXX divided by 6 XXX divided by 9 is approximately 97.XXX 3:352 divided by 5 is approximately 70.429 divided by 8 XXX divided by 8 XXX divided by 7 is approximately 85.197 divided by 3 is approximately 66.287 divided by 4 is approximately 72.220 divided by 3 is approximately 73.512 divided by 8 XXX divided by 3 is approximately 34.566 divided by 7 is approximately 81.519 divided by 6 is approximately 87.728 divided by 8 is approximately 91.308 divided by 7 XXX 190 divided by 2 is approximately 95.804 divided by 9 is approximately 89.444 divided by 6 XXX divided by 8 is approximately 91.388 divided by 4 XXX divided by 5 is approximately 17.427 divided by 5 is approximately 85.432 divided by 8 XXX divided by 9 is approximately 60.210 divided by 4 is approximately 53.370divided by 7 is approximately 53.706 divided by 9 XXX 190 divided by 6 is approximately 32.598 divided by 8 is approximately 75.368 divided by 5 XXX divided by 8 is approximately 70.645 divided by 8 is approximately 81.520 divided by 6 is approximately 87.254 divided by 3 is approximately 85.396 divided by 4 is approximately 99.569 divided by 6 is approximately 95.451 divided by 9 is approximately 50.473 divided by 5 is approximately 95.XXX 4:315 divided by 7 XXX divided by 3 XXX divided by 9 is approximately 81.554 divided by 8 XXX divided by 6 is approximately 83.298 divided by 7 is approximately 42.267 divided by 7 is approximately 38.716 divided by 9 is approximately 80.521 divided by 5 is approximately 104.167 divided by 3 is approximately 56.369 divided by 4 is approximately 92.483 divided by 8 is approximately 60.248 divided by 8 is approximately 31.592 divided by 9 XXX divided by 9 is approximately 27.232 divided by 4 is approximately 58.434 divided by 8 XXX divided by 7 XXX divided by 8 isapproximately 40.368 divided by 5 is approximately 74.796 divided by 9 is approximately 88.460 divided by 5 is approximately 92.285 divided by 6 is approximately 48.375 divided by 8 is approximately 47.197 divided by 3 is approximately 66.408 divided by 9 is approximately 45.508 divided by 6 is approximately 85.148 divided by 4 is approximately 37.347 divided by 5 is approximately 69.267 divided by 3 is approximately 89.567 divided by 9 XXX divided by 9 XXX 490 divided by 6 XXX divided by 6 XXX divided by 9 is approximately 56.352 divided by 4 is approximately 88.脱式计算：390+30)÷÷5÷+4675÷5396÷3÷2 = 5.5648+480÷3 = 84845÷(15÷3) = 925×8÷4 = 50124-735÷7 = 23601－246÷5 = 153985-168÷4 = 94734+22)÷8 = 6205+7×8 = 26162-(25-7)×32+×3-+248-475 = 219,164 294+399÷7 = 35464+396÷3 = 232470÷5-÷9÷7 = 46278÷3÷5684+207÷3140÷5÷2 = 0.0156×8÷XXX÷(54÷9) = 0.67用竖式计算并验算：348÷3=116，398÷7=57，365÷5=73，380÷6=63，724÷4=181309÷3=103，270÷6=45，628÷3=209，750÷5=150，105÷7=15912÷3=304，608÷3=203，208÷8=26735÷9=81，860÷2=430。
