College Algebra / Unit 1 Alg 004 short lesson, about 20 seconds
Rational Numbers
Captions available
The idea
A rational number is any number writable as a fraction of two integers with a nonzero denominator; its decimal form ends or repeats.
In practice
3/4 ends at 0.75; 1/3 repeats as 0.333…; the integer 7 qualifies as 7/1.
Where people slip
Every integer is rational; the reverse fails.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
- Nothing. This is a starting point.
Unlocks
- Nothing yet depends on this.
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