8th Grade · Expressions & Equations
LCD
8.EE.C.7b
Definition
The least common denominator, the smallest multiple shared by all denominators. Multiplying every term of an equation by the LCD clears the fractions.
Examples
- Denominators 2, 3, 6 have LCD = 6.
- Multiply every term by the LCD, including whole numbers.
Key rule
Multiply every term, not just the fractions.
Memory hook
Clear the fractions by multiplying by the LCD.