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中一數學題 (20點)
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最佳解答:
1) Find 2 different numbers where their sum and difference are positive numbers, but their product and quotient are negative numbers. (Give 2 different sets of numbers) (a) 10 and -1 (b) 20 and -2 2)Answer: A=___8__, B=___3__, C=___9__, D=____6_ 3) ((x+10)/2)^2=(x^2+4x)/x x=5 4A,Commercial Bank B.Commercial Bank:$22222,,Express Communication:$50000-$22222=27778 5.7+3: 2+13= 2:3
其他解答:
1. 3 and -1 3+(-1)=2 3-(-1)=4 3*-1=-3 3/-1=-3 4 and -2 4+(-2)=2 4-(-2)=6 4*-2=-8 4/-2=-2 2.A=8 B=3 C=7 D=6 3.1+2+x+4/2+3=13 6+4/2+x=13 6+2+x=13 x=13-6-2 x=5 4.a) The stock price of Commercial Bank has increased after 2 months. 4.b)It means he has invested大約 $_23500____ on buying the stock of Commercial Bank and 大約$_26500____ on buying the stock of Express Communication. 5.1+3:2+4=2:3 2009-08-16 17:02:05 補充： c=9打錯了
中一數學題 (20點)
發問:
此文章來自奇摩知識+如有不便請留言告知
1) Find 2 different numbers where their sum and difference are positive numbers, but their product and quotient are negative numbers. (Give 2 different sets of numbers)(a) _____ and _____(b) _____ and _____2) The following letters represent different numbers (0 to 9), find out the numbers they are... 顯示更多 1) Find 2 different numbers where their sum and difference are positive numbers, but their product and quotient are negative numbers. (Give 2 different sets of numbers) (a) _____ and _____ (b) _____ and _____ 2) The following letters represent different numbers (0 to 9), find out the numbers they are representing respectively! CD BCD + ABCD --------------- 8 8 8 8 Answer: A=_____, B=_____, C=_____, D=_____ 3) Write an equation which needs at least 3 steps to solve it and its solution is 5. ___________________________________________________ 4) Father has bought the stocks of Commercial Bank and Express Communication for 2 months. The stock price of Commercial Bank increased by 10% in the 1ST month and then decreased by 5% the next month. The stock price of Express Communication deceased by 20% in the 1ST month and then increased by 25% the next month. (a) The stock price of ______ has increased after 2 months. (b) Father has invested $50000 on buying these two stocks. After 2 months, he earned at least $1000. It means he has invested $_____ on buying the stock of Commercial Bank and $_____ on buying the stock of Express Communication. 5) Fill in the blanks with 4 different prime numbers, where the sums of 2 groups are in the ratio of 2:3. _____+_____: _____+_____ = 2:3 更新: 第2題 http://img43.imageshack.us/img43/8140/123qst.jpg最佳解答:
1) Find 2 different numbers where their sum and difference are positive numbers, but their product and quotient are negative numbers. (Give 2 different sets of numbers) (a) 10 and -1 (b) 20 and -2 2)Answer: A=___8__, B=___3__, C=___9__, D=____6_ 3) ((x+10)/2)^2=(x^2+4x)/x x=5 4A,Commercial Bank B.Commercial Bank:$22222,,Express Communication:$50000-$22222=27778 5.7+3: 2+13= 2:3
其他解答:
1. 3 and -1 3+(-1)=2 3-(-1)=4 3*-1=-3 3/-1=-3 4 and -2 4+(-2)=2 4-(-2)=6 4*-2=-8 4/-2=-2 2.A=8 B=3 C=7 D=6 3.1+2+x+4/2+3=13 6+4/2+x=13 6+2+x=13 x=13-6-2 x=5 4.a) The stock price of Commercial Bank has increased after 2 months. 4.b)It means he has invested大約 $_23500____ on buying the stock of Commercial Bank and 大約$_26500____ on buying the stock of Express Communication. 5.1+3:2+4=2:3 2009-08-16 17:02:05 補充： c=9打錯了
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