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《求一个数的百分之几是多少》综合习题

《求一个数的百分之几是多少》综合习题
《求一个数的百分之几是多少》综合习题

《求一个数的百分之几是多少》综合习题

1.判断。

(1)5吨比4吨多25%,4吨就比5吨少25%。()

(2)男生人数比女生人数多20人,也就是女生人数比男生人数少20人。()

(3)一种商品现在售价200元,比原来降低了50元,比原来降低了25%。()

(4)从甲地到乙地,大客车要用8小时,小轿车要用5小时,大客车的速度比小轿车慢60%。()

2.连一连。

洗衣粉长有男职工80人,女职工50人。

3.在迎宾小学举行的文艺晚会上,歌舞类节目有1个,小品类节目有8个,小品类节目比歌舞类节目少百分之几?

4.填空。

(1)2012年我国的粮食产量比2011年增产3.2%,这里的3.2%表示()是()的百分之三点二。

(2)冬冬家2012年的家庭总收入比2011年增加35%,2012年冬冬家的家庭总收入是2011年的()%。

(3)海洋面积约占地球表面积的70.8%,陆地面积约占地球表面积的()%,海洋面积比陆地面积多占地球表面积的()%。

5.承德避暑山庄旺季门票每张售价120元,淡季门票每张售价80元。每张旺季门票比淡季门票贵百分之几?

6. 2004年雅典奥运会中国体育代表团获得32枚金牌,2012年伦敦奥运会中国体育代表团获得的金牌数比2004年雅典奥运会多6枚。2012年伦敦奥运会中国体育代表团获得多少枚金牌?比2004年多百分之几?

7.鸡蛋、牛肉、黄豆三种食物每100克的蛋白质含量如下表。

(1)每100克鸡蛋的蛋白质含量比牛肉少百分之几?

(2)每100克黄豆的蛋白质含量比牛肉多百分之几?

8.下面是一些动物的平均寿命。

(1)狗的平均寿命比牛短百分之几?

(2)请你提出一个百分数问题,并解答。

9.甲、乙、丙三家商店出售同一种饮料,大瓶10元,小瓶2.5元。促销活动如下:甲商店买1大瓶送1小瓶;乙商店降价10%;丙商店满30元降价20%。请你帮顾客选择合适的商店(只能选择一家商店)

10.一个长方体木块的长是8 cm,宽是6 cm,高是3 cm,如果切下一个最大的正方体,这个木块的体积减少百分

之几?

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