3.16数学作业公示

日期

3.16

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 解决问题

基础必做题：

具体内容：李老师骑自行车的速度是225米/分，15分钟可行多少千米？                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       

提升选做题：一辆从北京到青岛的长途汽车，早晨6:30从北京发车，平均每小时行驶85千米，大约需要8小时到达青岛。

（1）北京到青岛大约有多少千米？

（2）这辆长途汽车大约什么时间到达青岛？

部分解答参考建议

基础题：225×15= 3375（米）=3.375（千米）

答：20分钟可行3.375千米。  

提升题：（1）85×8＝ 680（千米）

答：北京到青岛大约680千米。  

（2）6时30分+8小时＝ 14时30分

答：这辆长途汽车大约14时30分到达青岛。                        

备注：基础题必做，提升题选做。

主管领导签字：    时玉芳