Number System

3. /All positive and negative fractions, including integers and so-called improper fractions. Numbers that can be written as a ratio of integers with nonzero denominator and can be indicated by the symbol .
5. /The numbers 0, 1, 2, 3, 4, 5, etc.
7. / Complex numbers with no real part, such as 5i,  -a.
8. / All positive and negative whole numbers (including zero). That is, the set {... , –3, –2, –1, 0, 1, 2, 3, ...}. Integers are indicated by either or J.
9. /Numbers like 3 – 2i or that can be written as the sum or difference of a real number and an imaginary number and are indicated by the symbol .
10. Numbers / All numbers on the number line. This includes (but is not limited to) positives and negatives, integers and rational numbers,square roots, cube roots , π (pi), etc. Real numbers are indicated by either or .

1. A ratio ( )of numbers or variables. Fractions may not have denominator 0.
2. / It refers to any number written in decimal notation, example : 0.3, 5.654
4. / Real numbers that are not rational. Numbers such as , , , π, e, etc. Real numbers that are not rational and represented by the symbol .
6. /The numbers used for counting. That is, the numbers 1, 2, 3, 4, etc.