五年级数学下册4.5《有趣的测量》课件2北师大版.ppt

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有趣的测量,乌鸦喝水的故事,乌鸦喝水的故事,想一想,填一填,2、长方体体积=( ) ( )( ),3、正方体体积=( ) ( )( ),1、物体所占( )的大小就是这个物体的体积。,空间,长,宽,高,棱长,棱长,棱长,不能直接用公式求出体积怎么办呢?,放入石块前,底面长 底面宽 水面高,升高法:,放入石块后,水面高,升高法:,放入石块后,水面升高了多少?,水面上升的高度,升高法:,石块的体积是多少?,上升的水的体积=石块的体积,升高法:,将石块放入盛满水的容器.,溢出法:,放入石块.,溢出法:,测量溢出的水,溢出法:,石块的体积是多少?,溢出的水的体积=石块的体积.,溢出法:,上升的水的体积=石块的体积,溢出的水的体积=石块的体积.,升高法,溢出法,一个长方体容器,底面长2分米,宽1.5分米,放入一个土豆后,水面升高了0.2分米,这个土豆的体积是多少?,21.50.20.6(立方分米),测量一粒黄豆的体积.,思考:,本课小结,在实践与操作过程中,尝试用多种方法解决实验问题。,

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