鲁教版五年级数学下(复习题1)(最新整理)
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鲁教版五年级数学下(复习题 1)
1. 小圆的直径等于大圆半径,大圆与小圆周长的比是( ),面积的比是( )。
2. 如图,半圆的半径是 3㎝,则周长是( )㎝,面积是( )㎝²。
3.圆周率( )3.14。
A.大于 B.小于 C.等于4.半圆的周长可以表示为( )。
A. πr+r B. πd+d C. (π+2)r
5. 一个半圆形养鱼池,直径是 4m,这个养鱼池的周长是多少米?占地面积是多少平方米?
6. 有两个用皮带相连的圆形轮子,大轮的直径是 1.5 米,小轮的直径是 0.5
米,若大轮转一圈,小轮转多少圈?
7. 一台轧路机前轮直径为 1.2 米,每分钟滚动 5 周,1 小时能前进多少米?
8. 在一张长 4㎝,宽 3㎝的长方形纸片上,剪去一个最大的半圆,剩下部分纸片的面积是多少平方厘米?
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