If the point corresponding to the real number a on the number axis is on the left side of the origin, and the distance from the point to the origin is 5 unit lengths, then a=______ ．

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• 1. If the number represented by point a on the number axis is a real number a (on the left), then the distance from a to the origin is I think it's a, because according to the number axis, the absolute value of the distance between two numbers, the absolute value of the distance from 0 to - A is a, but the answer is - A, why, if there is a positive a, then the distance between positive a and negative a is a, where is - a? We can only say that the point is - A, but the distance is still a
• 2. If the distance between the point of X on the number axis and the origin is less than 5, then the inequality x satisfies is
• 3. The positions of rational numbers a, B and C on the number axis are shown in the figure. If M = | a + B | - | B-1 | - | a-c | - | 1-C |, what is the value of 100m? ----|------|----|-----|-----|----- b a 0 c 1 The first point represents B and the second point represents a
• 4. The positions of rational numbers a, B and C on the number axis are shown in the figure. If M = | a + B | - | B-1 | - | a-c | - | 1-C |, the value of 100m is______ ．
• 5. The positions of rational numbers a, B and C on the number axis are shown in the figure. If M = | a + B | - | B-1 | - | a-c | - | 1-C |, the value of 100m is______ ．
• 6. The positions of rational numbers a, B and C on the number axis are shown in the figure. If M = | a + B | - | B-1 | - | a-c | - | 1-C |, then the value of - 1001 is? b a c ─┴────┴──┴───┴─┴─＞ 0 1 ）There will be a reward for wealth before 10 o'clock this evening! It will be invalid if it is too late!]
• 7. Given that the number corresponding to point a on the number axis is a, the number corresponding to point B is B, and | a + 4 | + (B-1) 2 (this is the second power) = 0, the distance between a and B is recorded as | ab |, (2) Let the number corresponding to point P on the number axis be X. when PA Pb = 2, find the value of X (3) If the point P is on the left side of a, m and N are the midpoint of PA and Pb respectively, when P moves on the left side of a, the following two conclusions (1) the value of PM + PN remains unchanged; (2) the value of PN - PM remains unchanged. (1) (2) there is only one correct conclusion, judge and find its value
• 8. Given that the number corresponding to point a on the number axis is a, the number corresponding to point B is B, and | a + 4 | + | B-1 | = 0, the distance between a and B is recorded as | ab |, and | ab | = | A-B | 1. Let the number corresponding to point P on the number axis be X. when | PA | - | Pb | = 2, find the value of X; 2. If the point P is on the left side of a, and m and N are the midpoint of PA and Pb respectively, when P moves on the left side of a, the following two conclusions will be drawn: 1. The value of | PM | + | PN | remains unchanged; 2. The value of | PN | - | PM | remains unchanged, and only one of them is correct. Please judge the correct conclusion and find its value
• 9. Given that the corresponding number of point a on the number axis is a, and / A + 4 / + / B-1 / = 0, the distance between a and B is recorded as / AB /, and / AB / = / A-B / 1, find the length of line AB / AB /; 2. Let the number corresponding to point P on the number axis be X. when / PA / - / Pb / = 2, find the value of X
• 10. For example, 5.2-x = 1.721/x = 8.478-x = 32
• 11. If the system of inequalities 2x + 3 ≥ 1 MX
• 12. The solution set of inequality system 3 / 2x + 1 ＞ X-1 / 2,3-x ≥ 2 is expressed as?
• 13. The solution set X + 1 ＜ 3 ① 2x + 9 ＞ 3 ② is expressed on the number axis
• 14. Given that the distance between the point M representing the number a and the point n representing the number - 1 on the number axis is 3, and the distance between the point n representing the number B and the point n representing the number 2 is 4, find the distance between the two points m and n
• 15. When point C is located on the number axis, the value of | x 1 | X-2 | is the smallest?
• 16. If the point C represents the number x, when the point C is at what position, the minimum value of | x + 2 | + | x-3 |?
• 17. If the number represented by point C is x, when point C is at what position, the minimum value of | x + 1 | + | X-2 |?
• 18. If the number represented by point C is x, when point C is at what position, the minimum value of | x + 1 | + | X-2 |?
• 19. If the number represented by point C is x, when point C is on the number axis, where does | x + 1 | + | X-2 | get the minimum value? Write down the process of doing the problem. Write the arithmetic or the written form
• 20. The distance between a and B is expressed as | ab | = | A-B |. Please find the minimum value of | x + 1 | + | X-2 |