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If a is a rational number, then the following statement is correct: |a | must be a positive number | - a | must be a positive number - |a | must be a negative number |a | + 1 must be a positive number
|A | + 1 must be a positive number because | a | is greater than or equal to 0
RELATED INFORMATIONS
- 1. The following statement is incorrect () A. - 3.14 is a negative number, a fraction, and a rational number. B. 0 is neither a positive number nor a negative number, but the integer C. - 2000 is both a negative number and an integer, but not a rational number. D. 0 is not a positive number
- 2. The correct statement about-3.1415 is that A. is a negative number, not a fraction B. is a negative number, not a rational number C. is a negative number, also a fraction D. is a fraction, not a rational number
- 3. -(1 / 3 + m square n + m cube) - (2 / 3-m square N-M cube) reduction
- 4. (2m) cubic times m square= Please write down the detailed calculation steps
- 5. How many cubic decimeters does 23.36 cubic decimeters equal
- 6. 183 decimeter cubic equals () meter cubic
- 7. 4.7 cubic decimeter equals () liter
- 8. 2.4 cubic decimeter = how many liters
- 9. 4.9 cubic decimeter = () liter () ml
- 10. 500 cubic decimeter = () cubic meter 2 liter = () cubic decimeter 4.7 liter 500 cubic decimeter = () cubic meter 2 liter = () cubic decimeter 4.7 liter = () cubic centimeter
- 11. If a denotes a rational number, then the following statement is correct: a | a | must be a positive number; B - (- a) must be a positive number; C if - | a | must be a negative number D | a | must not be less than a
- 12. A is a rational number, then the following statement is correct: A is a positive number B - a C A and - a must have a negative number d a and - a represent a pair of opposite numbers
- 13. In the following statement of 0, it is true that a.0 is neither positive nor negative, b 0 is the smallest integer, C 0 is a rational number, and d 0 is a non negative number The diameter of a part is 30 + 0.03-0.02 unit mm in the drawing, which means that the standard size of the part is 30mm, and the maximum machining size is required not to exceed () a.0.02 b0.03 c30.03 d29.98
- 14. The following statements are correct: (1) a rational number is not an integer or a negative number; (2) a rational number is not an integer or a fraction
- 15. What's wrong with the following statement is that 0 is not a positive number
- 16. The rational number with the smallest absolute value is () A. 1b. 0C. - 1D. Does not exist
- 17. a. B, C and D are four rational numbers whose absolute values are 1, 2, 3 and 4 respectively (1) Please write two formulas so that a + B + C + D = - 2 Formula 1:_____________ Formula 2:_____________ (2) Can you write a formula so that a + B + C + D = - 1:1______ (fill in "can" or "can't")
- 18. The solution of X / 0.3 - (0.03 + 0.05x) / 0.02 + 4 = 0
- 19. x/0.3-（0.03+0.05x）/0.02+4=0
- 20. To solve the equation: 0.2 of 0.3x + 0.5-0.03 of 0.02-0.05x = 3 of 2x + 1