二年级数学下册五《加与减》回收废电池练习北师大版.doc

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1第二节 回收废电池轻松准备笔算三位数加法时,首先要把相同数位对齐,从个位加起,哪一位相加满十,就要向前一位进一。快乐学习1 用计数器算一算,画一画。2.我是小小演算家。3.接力赛。(1)2(2)4填一填。估算 178363 时,把 178 看作( ),把 363 看作( ),结果是( )。估算 463214 时,把 463 看作( ),把 214 看作( ),结果是( )。5下面是文具店进货情况,请你把表格填写完整。6看线段图列式计算。(1)(2)37森林医生。拓展练习8文具店卖出 161 枝 ,比 少卖出 95 枝。(1) 卖出多少枝?(2)两种笔一共卖出多少枝?9.1 台电暖气 128 元,1 台电热水器比它贵 426 元,买 1 台电暖气和 1 台电热水器一共要用多少钱?10.想一想,算式中每个汉字代表的数字是多少。真( ) 奇( ) 妙( ) 啊( )4答案与点拨2. 971 890 884 590 690 7733(1)950 1070 1360 1830(2)305 525 664 9715. 694 枝 892 本 975 块6. (1)481156637(人) (2)528263791(只)8. (1)16195256(枝) (2)256161417(枝)9. 128426128682(元)10.真 (1) 奇(0) 妙(9) 啊(8)

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