(急)幫幫手呢``英文數學.....10題內
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Express each of the following measurement in single unit or compund number.
(Express the answer in fraction in necessary.)
1. 8 h 3 min = _________ h
2. 7 min 12 s = __________min
3. 6 7/10(6又10分之7) h = _______ h _____ min
4. 9 3/5 (9又3分之5) min = ______min ________ s
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5. It took May 25 minute to complete questionnaire.How many hours does it take her to complete 6 questionnaires ? (Express the answer in decimal if necessary)
6. Francis had $150.He used 20% of the amount to buy stationery and 34% to buy a toy.He saved 50% of the remainder. How much did he save ?
*7. There are 6 Arts books in bookcase . The number of Arts book in that bookcase is 25% that of Scientific fictions, and the number of Scientific fictions is 40% of the whole number of books. How many books are there in the bookcase?
8. The government plans to build a large housing estate in a mew town.The estate will have twelve 36-storey buildings with 18 units on each floor.According to the Census, we can estimate the average number of inhabitants in each unit to be 5.23 . Find the number of inhabitants this estate will have,round off the answer correct to the nearest ten thousand.
9*. Bobby has one piece of rectangular building block and one piece of cubic building block.The rectangular block has length 4.5 cm and breadth 4 cm while each side of the cubic block is 3 cm . It is given that the vloumes of the two building blocks are the same . Find the height of the rectangular block.
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(急)幫幫手呢``英文數學.....10題內 15點
2008-08-06 4:56 am
回答 (2)
2008-08-06 7:11 am
✔ 最佳答案
1. 8 h 3 min = ____8 1/20__(8又20分之)___ h2. 7 min 12 s = __432________min
3. 6 7/10(6又10分之7) h = ____6___ h __43___ min
4. 9 3/5 (9又3分之5) min = ___9___min __36______ s
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5. 25 mins x 6 questionnaires = 150 mins / 60 mins (coz 60 mins = 1 hr) = 2.5 hrs
6. [$150 - ($150 x 20%) - ($150 x 34%) ] x 50% = $ 34.5
*7. (6 books / 25 %) / 40% = 60 books
8. 36 storeies x 18 units x 12 buildings x 5.23 inhabitants = 40,668.48 = 40,000 inhabitants
9*. Let the height of the rectangular block is y
y x 4.5 cm x 4 cm = 3 cm x 3cm x 3cm
y = 9 / 18
y = 0.5
The height of the rectangular block is 0.5cm
2008-08-05 23:13:14 補充：
9*. Let the height of the rectangular block is y
y x 4.5 cm x 4 cm = 3 cm x 3cm x 3cm
y = 27 / 18
y = 1.5
The height of the rectangular block is 1.5cm
參考: myself, myself
2008-08-06 7:11 am
1) 8 h 3 min = 8.05 h
(8*60+3)/60
2) 7 min 12 s = 7.2 mins
(7*60+12)/60
3) 6 7/10(6又10分之7) h = 6 h 42 mins
6 7/10*60-6*60 = 42mins
4) 9 3/5 (9又3分之5) min = 9 min 36 s
9 3/5*60-9*60 = 36mins
5) Hours it take May to complete 6 questionnaires
= [(25/60)*6]hr
= 2 1/2
= 2.5hr
6) Money he save
= $[(150-150*20%-150*34%)*50%]
= $[(150-30-51)*50%]
= $(69*50%)
= $34.5
7) The no. of books in the bookcase
= 6+6/25%+(6/25%)/40%
= 6+24+24/40%
= 6+24+60
= 90
8) The number of inhabitants
= 12*36*18*5.23
= 40668.48
= 40000(cor. to the nearest ten thousand)
9) The volume of the cubic block
= (3*3*3)cm³
= 27cm³
The height of the rectangular block
= (27÷4.5÷4)cm
= 1.5cm
2008-08-05 23:12:15 補充：
Hope this can help you la~
(8*60+3)/60
2) 7 min 12 s = 7.2 mins
(7*60+12)/60
3) 6 7/10(6又10分之7) h = 6 h 42 mins
6 7/10*60-6*60 = 42mins
4) 9 3/5 (9又3分之5) min = 9 min 36 s
9 3/5*60-9*60 = 36mins
5) Hours it take May to complete 6 questionnaires
= [(25/60)*6]hr
= 2 1/2
= 2.5hr
6) Money he save
= $[(150-150*20%-150*34%)*50%]
= $[(150-30-51)*50%]
= $(69*50%)
= $34.5
7) The no. of books in the bookcase
= 6+6/25%+(6/25%)/40%
= 6+24+24/40%
= 6+24+60
= 90
8) The number of inhabitants
= 12*36*18*5.23
= 40668.48
= 40000(cor. to the nearest ten thousand)
9) The volume of the cubic block
= (3*3*3)cm³
= 27cm³
The height of the rectangular block
= (27÷4.5÷4)cm
= 1.5cm
2008-08-05 23:12:15 補充：
Hope this can help you la~
收錄日期: 2021-04-18 00:23:46
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080805000051KK03140