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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. 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 ...

  4. 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

  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 ...