(橫式,步驟,答案)
1.)朱古力糖一盒有24粒,哥哥吃了6粒,吃去的佔百分之幾?餘下的佔百分之幾?
2.)永玉在歌唱比賽中獲得獎金600元,買錄音機一具用去75%,她用去了多少元?
3.)絲帶一條長4米,剪去15%,還餘多少米?
4.)校服每套120元,乒年加價10%,今年的售價是多少元?
5.)永正有180元,買運動鞋用去40%,買運動褲用去35%,共用去多少元?
6.)李伯月薪6000元,屋租佔20%,家用佔50%,家用比屋租多幾元?
百分率計算
2006-11-15 3:59 am
回答 (2)
2006-11-15 4:19 am
1)a) 6/24 X 100%
=(600/24)%
=25%
b) {(24-6)/24} X100%
=(1800/24)%
=75%
2) 600 X 75%
=600 X (75/100)
=450
3)4 X(100%-15%)
=4 X 85/100
=3.4
4)120 X (100% + 10%)
=120 X 110/100
=132
5) { 180 X (40% +35%)}
= {180 X(40/100 +35/100)}
= {180x 75/100}
=135
6)6000 X 50 % -( 6000 X 20%)
= 3000-1200
=1800
=(600/24)%
=25%
b) {(24-6)/24} X100%
=(1800/24)%
=75%
2) 600 X 75%
=600 X (75/100)
=450
3)4 X(100%-15%)
=4 X 85/100
=3.4
4)120 X (100% + 10%)
=120 X 110/100
=132
5) { 180 X (40% +35%)}
= {180 X(40/100 +35/100)}
= {180x 75/100}
=135
6)6000 X 50 % -( 6000 X 20%)
= 3000-1200
=1800
2006-11-15 4:12 am
1)吃去的佔：
6/24x100%
=1/4x100%
=25%
餘下的佔：
1-25%
=75%
或者
(24-6)/24x100%
=18/24x100%
=3/4x100%
=75%
2)她用去了：
600x75&
=450(元)
3)還餘：
4x(1-15%)
=4x85%
=3.4(米)
4)今年的售價：
120x(1+10%)
=120x110%
=132(元)
5)共用去：
180-180x40%-180x35%
=180-72-63
=108-63
=45(元)
6)家用比屋租多：
6000x(50%-20%)
=6000x30%
=1800(元)
6/24x100%
=1/4x100%
=25%
餘下的佔：
1-25%
=75%
或者
(24-6)/24x100%
=18/24x100%
=3/4x100%
=75%
2)她用去了：
600x75&
=450(元)
3)還餘：
4x(1-15%)
=4x85%
=3.4(米)
4)今年的售價：
120x(1+10%)
=120x110%
=132(元)
5)共用去：
180-180x40%-180x35%
=180-72-63
=108-63
=45(元)
6)家用比屋租多：
6000x(50%-20%)
=6000x30%
=1800(元)
收錄日期: 2021-04-13 14:10:56
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061114000051KK03601