Numbers
Natural Numbers
Counting numbers
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1
2
3
4
5
Whole Numbers
Natural numbers including zero
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0
1
2
3
4
Integers
Whole numbers and their negatives
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-2
-1
0
1
2
Rational Numbers
Numbers expressible as fractions
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½
¾
1.5
-2.25
0.75
Visualization
Irrational Numbers
Numbers which cannot be expressed as fractions
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π
√2
e
φ
√3
Special Numbers
Real Numbers
All numbers on the number line, including rational and irrational numbers
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-2
½
π
0
√2