《升和毫升》(认识升和毫升)教学课件

归纳总结
1.容器中所能容纳液体的多少，就是容 器的容量。
2.计量液体的多少，用升和毫升作单位。 升用字母“L”表示，毫升用字母“mL” 表示。
试一试
测量自己水杯的容量，算一算 每天应该喝大约几杯水。
练一练
1.怎样使两个瓶子里的水同样多？
2.读一读。
3.看图填空。
4.用自己的水杯测量家中四件不同容器 的容量。
冀教版数学四年级上册第一单元
认识升和毫升
教学目标
1、在实际操作活动中了解容量的概念，认识“升” 和“毫升”，会用字母表示“升”和“毫升” 。 2、认识测量工具量杯和量筒，会读量杯和量筒上的 刻度。 3、在实验活动中获得愉快的学习体验和数学活动经 验。
哪个杯子盛水最多， 哪个杯子盛水最少？
比一比：下面两个杯子哪个盛水多？
ab
方法一
1.把b杯子装满水，倒入a杯子中……
方法二
2.把两个杯子都装满水，分别倒进两个一样大 的杯子里。
结论：a杯子盛水多。
两个杯子大小不同，盛水的 多少也不同，杯子容纳水的多 少，就是杯子的容量。
比一比：下面哪个瓶子装的饮料多？
说一说可以 怎样测量？
ab
除了把两瓶饮料分别倒进两个一样 大的杯子里之外，想一想，还有什么 方法？
认识量筒和量杯。
量筒和量杯有什么区别？
区别：量筒口径上下均 匀，所以刻度均匀；量 杯口径下小上大，所以 刻度下疏上密。
认识升和毫升。
计量液体，如汽油、饮料、药 水等，用升和毫升作单位。升用 字母“L”表示，毫升用字母 “mL”表示。
把两个瓶子中的饮料分别倒入同样的量杯中 量一量。
a瓶饮料多
b瓶饮料少
ห้องสมุดไป่ตู้
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科学研究表明，为了维持人体的
需要，除了侦察过的饮食外，一个
人每天应该饮水大约1400毫升。