Fill in the blanks with approprite words.
1. a number belonging to the set made up of zero and the natural numbers
2. natural number the opposite or negative of a number; the sum of a number and its additive inverse is zero
3. a number belonging to the set made up of the whole numbers and their opposites
4. that can be written as a ratio of two integers in the form A/B with B ≠ 0
5. a number that CANNOT be written as a ratio of two integers, which has an infinite decimal representation that does not repeat
6. a number belonging to the set made up of the numbers that are used to count: 1, 2, 3, and so on
a. irrational number
b. rational number
c. whole number
d. additive inverse
e. integar
f. natural number