二年级数学下册五《加与减》算得对吗一课三练北师大版.doc

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1第六节 算得对吗1先用竖式计算,再验算。284397 验算:529136 验算:382604 验算:知识点 2减法的验算方法1 数学门诊。 (对的打“” ,错的打“” ,并改正、验算)(1)(2)升级跷跷板3给灯笼排排队。4商品降价啦!这些商品的价格比原来便宜多少钱?25卖冷饮。智慧摩天轮6 (趣味题)动脑筋,填一填。把 294、295、296、297、298、299、301、302、303、304、305、306 这十二个数填到下面方格中(每个数只能用一次) ,使等式成立。答案与点拨1. 681 665 9862. 138 6333. 7232363451296142923672584. 560385175(元)398075922l(元)5. 219496715(根)438184254(瓶)6. 294306295305296304297303298302299301

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