3.20数学作业公示

日期

3.20

年级

三

学科

数学

预计作业时长

10分钟

年级主任审核签字

解芳

作业内容

作业题目

第4单元 认识毫米

基础必做题：

具体内容：在括号里填上合适的长度单位 　　

（1）课桌宽3（   ）   （2）小蚂蚁身长6（   ）

（3）一根筷子长20（   ） （4）学校的雪松高8（    ）

（5）小敏身高137（   ）（6）拇指长约35（   ）                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   

提升选做题：

一本书厚20毫米，50本这样的书摞在一起厚多少米？

部分解答参考建议

基础必做题：

（1）分米 （2）毫米 （3）厘米

（4）米   （5）厘米 （6）毫米

提升选做题：20x50=1000（毫米）

        1000毫米=1米

答：50本这样的书摞在一起厚1米。                                               

备注：基础题必做，提升题选做。

主管领导签字：    时玉芳