二年级数学下册三《生活中的大数》数一数(一)练习北师大版.doc

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1、1第一节 数一数(一)1.10元 100 元 1000 元(1)一部手机的钱,可以买( )个 MP3,可以买( )枝钢笔。一个 MP3的钱可以买( )枝钢笔。(2)( )部手机的钱是一千,( )个 MP3的钱是一千,( )枝钢笔的钱是一千。2读一读。火星公转一周要六百八十七天。月球表面的最低温度约零下一百八十三摄氏度。刚建成的上海卢浦大桥主跨五百五十米。快乐学习3我会数数。(1)一个一个地数,从四百九十六数到五百一十。(2)一十一十地数,从九百七十数到一千。(3)一百一百地数,从六百数到九百。4我会填。(1)10个( )是一千,一千里面有( )个一百。(2)三百里面有( )个百,6 个百是(

2、)。(3)七千里面有( )个千,4 个千是( )。(4) 5比一比,看谁先回家。 (找规律)(1)2(2)6说出下面每个数是由几个百、几个十、和几个一组成的。(1)三百八十六是由( )个百、( )个十和( )个一组成的。(2)八百零一是由( )个百、( )个十和( )个一组成的。(3)七百二十是白( )个百、( )个十和( )个一组成的。7小小售货员。(1)买 10副手套需要( )元钱,这些钱可以买( )辆自行车。(2)小王有 1000元钱,能买( )辆自行车。8小明每月能存二百元钱,( )个月存一千元;如果买一张电脑桌需要 750元,需要存( )个月。9一千元钱买下列 3种物品,还剩( )元钱。10.有一个三位数,它的各个数位上的数字之和是 9,从百位起,每个数位上的数字比3前一位数字小 1,这个三位数是多少?拓展练习11涂一涂。用喜欢的颜色涂出二百八十个小方格。答案与点拨1. (1)10 100 10 (2)1 10 1004(1)一百 十(2)3 600 (3)7 4000 (4)千位 十位5(1)140 160 180 210 220 (2)296 299 3006(1)3 8 6 (2)8 0 1 (3)7 2 07(1)100 1 (2)108.5 49. 100元10. 432

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