The sum of all integers whose absolute value is less than 10 is______ ．

All integers whose absolute value is less than 10 are 0, ± 1, ± 2, ± 3, ± 4, ± 5, ± 6, ± 7, ± 8, ± 9. According to the addition rule of rational numbers, the sum of two opposite numbers is 0, so the sum of these 19 numbers is 0

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1. The sum of all integers whose absolute value is less than 10 is______ ．
2. What is the sum of all integers with absolute values greater than 10 and less than 14?
3. The sum of all integers whose absolute value is not less than 2 but less than 5 is______ ．
4. The sum of all integers whose absolute value is less than 10 is______ ．
5. Integers with absolute values less than 4 have (), integers with absolute values greater than 5.6 and less than 9.2 have ()
6. Why is the sum of all negative integers whose absolute value is greater than 2.5 but less than 5.6?
7. Find all integers with absolute value greater than 2 and less than 6
8. Integers with absolute values between 2 and 5 are————————
9. What are the integers with absolute values between 2 and 5
10. The sum of integers with absolute values between 2 and 9 is
11. Given that a is the sum of the opposite number of - 6 and the absolute value of - 10, B is the number of integers whose absolute value is not greater than 3, and C is the smallest natural number, the value of a + 2b-c is obtained? To be specific, it's better to have an absolute value
12. The product of all natural numbers with absolute value less than 5 is ()
13. The absolute value of a number is equal to its opposite number. This number will not be () A. negative integer B. negative fraction c.0 D. natural number
14. Let a B C be a nonzero vector w = A / (the absolute value of a) + B / (the absolute value of B) + C / (the absolute value of C), then the value range of the absolute value of W is Let a B C be a nonzero vector w = A / (absolute value of a) + B / (absolute value of B) + C / (absolute value of C) The range of absolute value of W is
15. The positions of rational numbers a, B and C on the number axis are shown in the figure, where the absolute value of a is equal to the absolute value of C, and the absolute value of a is divided by the absolute value of a + B Value divided by the absolute value of C + a minus the absolute value of C —————————————————————————— B A O I C
16. The positions of rational numbers a, B and C on the number axis are shown in the figure, where the absolute value of a is equal to the absolute value of C. simplify the following formula Absolute value of a in a + absolute value of B in B + absolute value of C in C + absolute value of a - absolute value of C —————————————————————————— B A O I C
17. The positions of the corresponding points of rational numbers a and B on the number axis are shown in the figure. Please judge whether | A-B | - | a + B | is positive or negative, and explain the reason
18. The positions of rational numbers m and N on the number axis are: m is a negative number with larger absolute value, n is a positive number with smaller absolute value, M-N =?
19. On the number axis, the positions of the points representing a, B and C are shown in the figure. C -- 0 -- a -- B -- simplify the absolute value of A-B plus the absolute value of a-c Value
20. a. The positions of B, C and the three numbers on the number axis are shown in the figure, simplifying the absolute value of a / A + the absolute value of B / B + the absolute value of C / C B is to the left of 0, a is smaller than B, and C is to the right of 0