Hey
--------------------------------------------------
Question #1:
B. The opposite of the opposite of −12 is −12 .
The opposite of -12 is 12, then the opposite of 12 is -12. So this option is true.
C. −12 and its opposite are located the same distance from zero on a number line.
-12 is 12 units away from 0. 12 is 12 units away from 0. So this option is true.
--------------------------------------------------
Question #2:
2/3 = 0.6666...
-4 1/2 = -4.5
1/4 = 0.25
-1/2 = -0.5
2 1/3 = 2.3333...
Least to Greatest: -4 1/2, -1/2, 1/4, 2/3, 2 1/3,
--------------------------------------------------
Question #3:
Remember that the greater the negative number the less it is. Also, absolute value changes the value to positive regarding it's sign.
-11 5/8 > -11 6/8
|-11 5/8| < |-11 6/8|
--------------------------------------------------
Hope This Helped! Good Luck!