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  1. ... demographics, the rate of natural increase (RNI) is the crude birth rate minus the crude death rate of a population. When looking at countries...

  2. ... December and January when the average temperature is minus 16. Of course, both poles are cold because the sun never ...

  3. 1. 6 + 2 - 1 = 7 2. 6 / 2 = 3 3. 23 x 89 = 2047 2007-08-04 16:29:36 補充: 1. 7 = sever, 2. 3 = three, 3. 2047 = two thousand and forty three

  4. Let the first no. be x. Then the second no. will be (x+1), the third no. will be (x+2). x+(x+1)+(x+2)-4x=1 3x+3-4x=1 -x+3=1 x=2 2007-10-15 19:29:54 ...

  5. 1+2+3+4+5+6+7+8*9=100

  6. Little John is a lovely six years old boy, all his friends call him LJ. LJ had a very fantastic dream last night which he never want to share with others. ...

  7. 解答︰ 我諗用中文解答會唔會好 d… 我係呢度都係用中文啦! 1/x = -1/7 其實個負號你中意放係邊都得嫁! -1/7 你可以寫成 1/-7,個答案都係「負七份一」 ...

  8. 1)sorry I can't get the meaning of the question. 2)Let x be the smallest no.then: x+(x+1)+(x+2)-4x=1 3x+3-4x=1 -x=-2 x=2 so the three no.s are ...

  9. 1)精確值 2)自然數 3)整數 4)餘數 5)被除數 6)除數 7)減去 8)因子 9)素數,質數 10)指數表示法 11)真分數 12)假分數 ...