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VIS (2019): IB Math Studies > Number Sets > Flashcards

Flashcards in Number Sets Deck (12)
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1

Are all natural numbers also integers?

Yes. Natural numbers (N) are a "subset" of integers (Z).

2

What are rational numbers?

They're numbers that could be written as a fraction. 

3

Is 0 (zero) a positive number?

Nope. Zero is neither positive nor negative.

4

What are natural numbers?

Numbers you can count on your fingers.

{0, 1, 2, 3, .....}

5

What are irrational numbers?

Numbers that can't be written as a fraction. You'll recognize these numbers in three ways:

6

What are integers?

They're whole numbers (no decimals, no fractions) but integers also include zero and negative numbers. 

{..., -2, -1, 0, 1, 2, ...}

7

What does this symbol mean?

Rational numbers: anything that could be written as a fraction.

8

Are all integers also rational numbers?

Yes. Integers (Z) are a subset of rational numbers (Q).

9

What does this symbol mean?

 

 

Natural numbers: {0, 1, 2, 3, ...}

10

What does this symbol mean?

Integers: {..., -2, -1, 0, -1, 2, ...}

11

What are real numbers?

Literally all of the numbers you've ever heard of. 

12

Are all natural numbers also rational numbers?

Yes. Natural numbers (N) are a "subset" or rational numbers (Q).