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# Unit 1 7th

### Rational Numbers

TermDefinition
Natural Numbers The set of numbers (1, 2, 3, 4, ...) These numbers an also be called counting numbers.
Whole Numbers All the natural numbers including zero. (not a fraction, decimal, or negative number).
Rational Numbers The set of numbers that can be written as a fraction and a terminating decimal.
Irrational Number Non-terminating decimals and numbers that cannot be written as a fraction. (Pi and square root of 2)
Integers The set of whole numbers and their opposites. (ex -3, 3)
Absolute Value The distance between a number and zero in the number line.
Opposite Numbers Two different numbers that have the same absolute value.
Common Denominators When adding or subtracting fractions you must have common fractions or use the rule of 4.
Reciprocal The "flip" of the second fraction in a division problem
Improper fraction A fraction that has a bigger numerator than the denominator.
Created by: jenniferlofty