What's the inverse of (- three and a half)? What's the reciprocal?

On the contrary, the number is three and a half
It's two out of seven

RELATED INFORMATIONS

1. -The opposite of (half to one third) is () and the reciprocal is ()
2. -(- two and a half) and () are opposite to each other, and () are reciprocal to each other
3. The reciprocal of four and a half opposite numbers is ()
4. If the opposite number of a number is 5 and half, then the number is? And the reciprocal of the number is?
5. -Factorization of 5A ^ 3B ^ 2 + 20A ^ 2b-5ab
6. If the square + BX + C of the quadratic trinomial ax is a monomial, the condition is A：a≠0,b＝0,c＝0 B：a＝0,b≠0,c＝0 C：a＝0,b＝0,c≠0 D：a＝0,b＝0,c＝0
7. Is the Square-1 of x a binomial
8. 6a³b²-4a²b²+2ab²
9. -4a³b+6a²b²-8a²b= Factorization,
10. Factorization: - 4A ^ 2B ^ 3 + 16ab ^ 2-12ab Factorization: (1)-4a^2b^3+16ab^2-12ab (2)6x^3y^2+12x^2y^3-6x^2y^2 (3)(x-3)(x-2)+(x-2)
11. What's the reciprocal of negative half?
12. If the rational number x equals its opposite and the rational number y equals its reciprocal, then y ^ 2008 + x ^ 2009= A 0 B 1 C -1 D 2 write the reason!
13. It is known that A. B is opposite to each other and C. D is reciprocal to each other. And y + 1 = 5, find Y2 + (a + B + CD) 2010 + (- CD) 2009 =?
14. a. Then a + B / 2010-2009 Mn = ()
15. -The reciprocal of the absolute value of 2.7 is, and the opposite of the reciprocal of 2 and 1 / 2 is
16. If we know that the inverse of the reciprocal of a is 5 and 1 / 7, then a = (), and the reciprocal of the absolute value of B is 2 and 1 / 3, then B = ()
17. If a + b 0 B.A
18. 5. If a + B < 0, AB < 0, then () a, a > 0, b > 0, B, a < 0, B < 0, C, a, B are positive and negative, and the absolute value of positive number is greater than that of negative number D A and B are positive and negative, and the absolute value of negative number is greater than that of positive number 6. Three brands of flour bags sold in a grain store are marked with the mass of (25 ± 0.1) kg, (25 ± 0.2) kg, (25 ± 0.2) kg respectively 3) kg, from which two bags can be taken out randomly, and their mass difference is () A 0.8kg B 0.6kg C 0.5kg D 0.4kg
19. A is negative, B and C are positive. Find the absolute value of a + C sum minus the absolute value of a plus the absolute value of B
20. A negative sign in front of a number becomes a negative number, Adding a negative sign before a number becomes a negative number. Is that correct If you add a negative sign before a number, it becomes the opposite of the number. Is () correct -Is 1 the largest negative integer () correct