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Pan Lloyds Mathematics Study Pack Summer Revision P.6-S.1
有標準答案當然最好
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答一兩題都夠嫁啦!
(應用題比埋條式我唔該)
1)1x2x3x...x99÷(6x7x8x...98)=?
A)113 B)120 C)490 D)11880
2)There are 48 staff in a company. If 18 of them are female, find the percentage of male staff in the company.
3)Consider two cuboids with both lengths as 5cm and widths as 4cm. They are melted to form a cube with side length 8cm.If the height of one cuboid is 10cm,find the height of the other.
4)Find (-1)+(+2)+(-3)+(+4)+...+(+10)
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唔該晒大家
！急！幾題英文數學題！１５點！
2013-07-30 9:52 pm
回答 (3)
2013-07-30 11:17 pm
✔ 最佳答案
首先恭喜你升中一。[Q1]
１＊２＊３＊４＊．．．＊９８＊９９ １＊２＊３＊４＊５＊９９
－－－－－－－－－－－－－－－－－ ＝ －－－－－－－－－－－－
６＊７＊８＊．．．＊９７＊９８ １
＝１１８８０ 即（Ｄ）
[Q2]
女的數目：１８
男的數目：４８－１８＝３０
所以男的百分比是：３０／４８＊１００％ ＝ ６２．５％
[Q3]
設未知數為Ｘ。
５＊４＊１０＋５＊４＊Ｘ＝８＊８＊８
２０＊Ｘ＝３１２
Ｘ＝１５．６
The height of the other cuboid is 15.6 cm.
[Q4]
請留意兩個一組。
(-1)+(+2)+(-3)+(+4)+...+(+10)
＝ １＋１＋１＋１＋１
＝ ５
2013-07-30 15:20:41 補充：
為什麼你們說Q3有wrong information???
參考: Calculated
2013-07-30 11:14 pm
1) (1x2x3x...x99)/(6x7x8x...x98) = 1x2x3x4x5x99 (因分子和分母均有6x7x8x...x98,故分子和分母可除去,剩下1x2x3x4x5x99) = 11,880 (D)
2)No of male staff in the company = 48-18 = 30, then the percentage of male staff in the company = 30/48 = 62.5%
3) Some information is wrong
4) (-1) + (+2) + (-3) + (+4) +...+(-9) + (+10) 可分為5組,即 (-1)+(+2),(-3)+(+4),(-5)+(+6),(-7)+(+8)及(-9)+(+10),而每組的和為1 (-1+2=1, -3+4=1, -5+6=1,-7+8=1及 -9+10=1),故總和=1+1+1+1+1=5
2)No of male staff in the company = 48-18 = 30, then the percentage of male staff in the company = 30/48 = 62.5%
3) Some information is wrong
4) (-1) + (+2) + (-3) + (+4) +...+(-9) + (+10) 可分為5組,即 (-1)+(+2),(-3)+(+4),(-5)+(+6),(-7)+(+8)及(-9)+(+10),而每組的和為1 (-1+2=1, -3+4=1, -5+6=1,-7+8=1及 -9+10=1),故總和=1+1+1+1+1=5
2013-07-30 10:40 pm
1,i think it is A
2,first it mentioned the total number of staff in company is 48,you must divide the (the total number of the staff in co) by (the number of female staff in co)and then times 100%
=(18/48)x100 =37.5%
3,the infomation have something wrong,check for yourself
4,-1+2-3+4-5+6-7+8-9+10=7
2,first it mentioned the total number of staff in company is 48,you must divide the (the total number of the staff in co) by (the number of female staff in co)and then times 100%
=(18/48)x100 =37.5%
3,the infomation have something wrong,check for yourself
4,-1+2-3+4-5+6-7+8-9+10=7
參考: me
收錄日期: 2021-04-13 19:36:45
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20130730000051KK00155