
Understanding Real Numbers
Flashcard
•
Mathematics
•
9th Grade
•
Practice Problem
•
Hard
Mary Scharbo
FREE Resource
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8 questions
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1.
FLASHCARD QUESTION
Front
What are Real Numbers?
Back
Real Numbers are the union of both rational and irrational numbers. They can be positive or negative and include counting numbers, fractions, decimals, radicals, and pi (π).
2.
FLASHCARD QUESTION
Front
What are Natural Numbers?
Back
Natural numbers are the set of counting numbers {1, 2, 3, 4, 5, 6, ...}. They are a subset of whole numbers.
3.
FLASHCARD QUESTION
Front
What are Whole Numbers?
Back
Whole numbers are the set of natural numbers along with zero {0, 1, 2, 3, 4, 5, 6, ...}.
4.
FLASHCARD QUESTION
Front
What are Integers?
Back
Integers are the set of all natural numbers, their negatives, and zero {...-4, -3, -2, -1, 0, 1, 2, 3, 4, ....}.
5.
FLASHCARD QUESTION
Front
What are Rational Numbers?
Back
Rational numbers can be expressed as a ratio (fraction) between two integers, where the denominator is not zero. They include integers, terminating decimals, and repeating decimals.
6.
FLASHCARD QUESTION
Front
What are Irrational Numbers?
Back
Irrational numbers cannot be written as a ratio (fraction). They include decimals that never end nor repeat, such as π.
7.
FLASHCARD QUESTION
Front
Are there numbers that are not Real Numbers?
Back
Yes, Complex Numbers include Real Numbers and other numbers like imaginary numbers (i) and complex numbers (a + bi).
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