L
- Law of exponents
- Leap year
- Least common multiple
- Length
- Less than
- Less than or equal to
- Like denominators
- Like terms
- Likely event
- Line
- Line graph
- Line of fit
- Line of reflection
- Line of symmetry
- Line plot
- Line segment
- Line symmetry
- Linear equation
- Linear function
- Linear relationship
- Liquid volume
- Litre
- Logic grid
- Logical condition
- Long division
- Long multiplication