What is the reciprocal of the reciprocal of a number?
0
1
The Number itself
C.
The Number itself
How many rational numbers are there between two consective rational numbers?
None
Only one
Infinitely many
Which rational number is called identity element for the addition of the rational numbers?
0
1
–1
What is the sum of a rational number and its additive inverse?
0
1
The rational number itself