Cut 1 / 2 of the 1000 meter iron wire for the first time, and then cut the remaining 1 / 3 for the second time, and so on, until the remaining 1 / 1000 is cut, and then calculate the length of the remaining iron wire It's better to have ideas and process!

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• 1. (1 / 100-1) (1 / 99-1) (1 / 98-1). (1 / 3-1) (1 / 2-1)
• 2. Calculation: two thirds + one and a half, - (- 1 and a third) | - 2 | - (- 2.5) -1-4 | 24 + (- 14) + (- 16) + 8 —40—28—（—19）+（—24）
• 3. Calculation: one and a half * one and a third * one and a quarter * one and a fifth *... * one and a hundredth
• 4. What's the product of the sum of one half and one third multiplied by the reciprocal of five sixth?
• 5. 36 times (- 29 and 17 / 18) = () with a simple method,
• 6. (minus one and a half) times (minus one and a third) times (minus one and a quarter) times (minus one and a fifth) times (minus one and a sixth) How much does it equal? (then above)
• 7. (one and a half - two and a third + thirteen fourths) * (- 42)
• 8. The difference between minus one-third and minus one-third plus minus one-and-a-half is the sum
• 9. Please add addition, subtraction, multiplication, division, parentheses and brackets to make the result equal to one 1 2 3 4=1 1 2 3 4 5=1 1 2 3 4 5 6=1 1 2 3 4 5 6 7=1 1 2 3 4 5 6 7 8=1 (from grade five winter vacation P2)
• 10. Function f (x) = x ^ 2 + 2x, the range of X ∈ [- 2,1] is? [] is bracket
• 11. A rope is 99 meters long, use half of it, then use the remaining 1 / 3, and then use the remaining 1 / 4. And so on, until the remaining 1 / 99 is used, how many meters are left in the end?
• 12. 1999 subtracts its 12, then subtracts the remaining 13, then subtracts the remaining 14, and so on, until finally subtracts the remaining 1 / 1999, finds the last remaining number
• 13. 2008 - half of it, minus the remaining third, minus the remaining quarter, and so on. Until the end, minus the remaining 208 Come on, let's go
• 14. 1. 2013 minus 1 / 2, and then minus the remaining 1 / 3, and then minus the remaining 1 / 4, and so on, all the way minus the remaining 1 / 2013, to find the final remaining number 2. Fold a rope into 3 pieces and cut it from the middle with scissors to get the rope () A. 3 b.4 C.5 d.6 3. On the number axis, the distance between two points B representing numbers x and - 1 can be expressed as_____________ . If iabi = 3, find the value of X
• 15. 2014 minus 1 / 2 of it, minus the remaining 1 / 3, minus the remaining 1 / 4, and so on, until the end Hurry, hurry, hurry,
• 16. Use 2013 to subtract its 12, then subtract the remaining 13, then subtract the remaining 14 And so on, until the last minus the remaining 12013, the final result is______ ．
• 17. 2011 minus 1 / 2 of it, then minus the remaining 1 / 3, then minus the remaining 1 / 4, and so on, until finally minus the remaining 1 / 2011, find the last remaining number?
• 18. 2011 minus half of it, then minus the remaining 1 / 3, then minus the remaining 1 / 4, and so on, until finally minus the remaining 1 / 2011 Find the last remaining number
• 19. 2010 minus one-half of it, and then minus the remaining one-third, in minus the remaining one-quarter, and so on, one minus the next one-third of 2010, find the most 2010 minus one-half of it, and then minus the remaining one-third, in the subtraction of the remaining one-fourth, and so on, one minus the next 20 urgent 10 percent, find the final remaining number? Urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent urgent
• 20. Subtract 1 / 2 of 2007, then subtract the remaining 1 / 3, then subtract the remaining 1 / 4... And so on until you subtract the remaining 1 / 2007 Second, we know that a + B + C = 0, and a + B + C = 0 Third: if the square of | X-1 | + | y + 2 | + (Z-3), find the value of formula (x + 1) (Y-2) (Z-3)