功課尼嫁...幫幫忙la
〔用方程解答〕
1) 已知兩個數的差是8,而它們的和是88,求較大的數。
2) 翠翠的年齡是她父親的四分之一。若翠翠較父親小27歲,求她的年齡。
3) 媽媽買了一個大蛋糕,哥哥吃了五分之一,姐姐吃了500g , 二人共吃去1 kg。問大蛋糕原來的重量是多少 ?
我唔識le三題數ar?
2006-11-22 5:16 am
回答 (5)
2006-11-22 5:21 am
✔ 最佳答案
1) let the large number be xx+x-8=88
2x=96
x=48
the larger number is 48
2) let her age be y years old
4y-y=27
3y=27
y=9
her age is 9yrs old
3) let the weight of the cake be x g
0.2x+500=1000
0.2x=500
x=2500
the weight of cake is 2500 g
2006-11-22 10:05 am
1, 設;較大的數為A,較小的數為B
A=B+8, A+B=88 B=88-A
A=(88-A)+8
A=88-A+8
2A=96
A=96/2
A=48
2,設;翠翠的年齡為A, 父親的年齡為B
A=1/4B, B=A+27
A=1/4(A+27)
A=1/4A+1/4X27
A-1/4A=27/4
3/4A=27/4
A=27/3
A=9
翠翠的年齡是9歲
3, 設蛋糕為A
1/5A+500G=1000G
1/5A=1000G-500G
1/5A=500G
A=500GX5
A=2500G
A=2.5KG
大蛋糕原來的重量是205KG
A=B+8, A+B=88 B=88-A
A=(88-A)+8
A=88-A+8
2A=96
A=96/2
A=48
2,設;翠翠的年齡為A, 父親的年齡為B
A=1/4B, B=A+27
A=1/4(A+27)
A=1/4A+1/4X27
A-1/4A=27/4
3/4A=27/4
A=27/3
A=9
翠翠的年齡是9歲
3, 設蛋糕為A
1/5A+500G=1000G
1/5A=1000G-500G
1/5A=500G
A=500GX5
A=2500G
A=2.5KG
大蛋糕原來的重量是205KG
2006-11-22 6:05 am
1)48
2)m......
3)3kg
2006-11-21 22:06:23 補充：
3)not 3kgis...2500g!
2)m......
3)3kg
2006-11-21 22:06:23 補充：
3)not 3kgis...2500g!
參考: me
2006-11-22 5:46 am
1. let be the smallest number is x, the biggest number is x - 8
x + x - 8 = 88
2x - 8 = 80
2x = 80
x = 40
therefore the biggest number is 48
2. let be x is her age.
4y - y = 27
3y = 27
y= 9
therefore her age is 9
3. let be x to ...
1000 = 0.2x + 500
0.2x = 500
x = 2500
therefore the big cake is 2.5kg.
2006-11-27 21:55:10 補充：
4) 4a = ba 4a = 455a = 45a = 9therefore a = 9.
x + x - 8 = 88
2x - 8 = 80
2x = 80
x = 40
therefore the biggest number is 48
2. let be x is her age.
4y - y = 27
3y = 27
y= 9
therefore her age is 9
3. let be x to ...
1000 = 0.2x + 500
0.2x = 500
x = 2500
therefore the big cake is 2.5kg.
2006-11-27 21:55:10 補充：
4) 4a = ba 4a = 455a = 45a = 9therefore a = 9.
參考: me
2006-11-22 5:20 am
1) (x-8)+x=88
2006-11-21 21:22:07 補充：
(x+27)=1x 4
2006-11-21 21:22:07 補充：
(x+27)=1x 4
收錄日期: 2021-04-12 17:20:32
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061121000051KK04256