三年级数学下册2《除数是一位数的除法》笔算除法(一位数除三位数的笔算)拓展练习新人教版.doc

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1一位数除三位数的笔算拓展练习1 (易错题)选一选。(1)计算 2563,商的首位应写在( )位上。A百 B十 C 个(2)( )6=314A 190 8 186 C182(3)除数为 9,商和余数相同,则被除数最大是( )八 100 8 80 C90答案 (1)B (2)A (3)B2 (变式题)一个足球 154元,一根跳绳 4元,买 2个足球的钱可以买多少根跳绳?答案 15424=77(根)3 (探究题)从 3、4、5、6、7、8 中选几个不同的数字填入下面的口中,使得商最接近 300。答案 被除数:876 除数:3 (实践题)比一比,谁的打字速度快?答案 小丽:2844=71(个)小明:4926=82(个)小明打字速度快。&2

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