三年级数学下册三《乘法》电影院课堂作业北师大版.doc

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1电 影 院备选例题三年级的学生和教师共 450 人去旅游租 12 辆这样的大巴车,够吗?准乘 38 人解析 判断 12 辆大巴车座位够不够时,要先求出 12 辆大巴车一共有多少个座位,然后与 450 人进行比较。答案 3812=456(个)456450 够备选习题1%( ) ( ) ( )2估算1939 3121 42591328 48X29 51513列竖式计算。3628= 3425= 1528=2832= 64 12= 3317=4连一连。30036095453181424251225一列火车挂了 24 节车厢,每节车厢可以坐 62 个人,这列火车一共可以坐多少个人?答案:1 3.1008 850 420 896 768 5615. 6224=1488(人)630103761174215

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