三年级数学下册2《除数是一位数的除法》口算除法同步精练新人教版.doc

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1口算除法一、在括号里最大能填几。30( )250 60( )18590( )380 80( )65050( )480 70( )43040( )180 20( )190二、口算。6002 6309 5000548008 2404 6606三、估算。527 2996 72491632 3125 8424四、比一比,真简单。 (在( )填上“” 、 “”或“” )2807( )1203 6408( )63091564( )1283 2719( )7002五、一个正方形的周长是 800厘米,这个正方形的边长是多少厘米?六、红旗小学 5位教师带领 175名同学去春游,如果每辆车坐 28人,租 6辆车够吗?(用两种方法解答)参考答案2一、8;3;4;8;9;6;4;9二、300;70;1000;600;60;110。三、7;50(或49) ;80;80(或81) ;60(或62) ;210(或200) 。四、;。五、8004 200(厘米)六、方法一:175 5 180(人) ,286 168(人) ,因为180 168,所以租6 辆车不够。方法二:175 5 180(人) ,1806 30(人) ,因为30 28,所以租6 辆车不够。

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