# Least Common Denominator - LCD

This page has printable worksheets on finding the Least Common Denominator, LCD, or Lowest Common Denominator.

## Two Fractions

This worksheet lays out the steps for finding least common denominators and then asks students to find the least common denominators for 6 pairs of fractions.
Calculate the least common denominator for each pair of fractions. This worksheet has 9 problems.
This file contains 30 task cards (4 per page). Each one has 2 fractions on it. Students find the LCD.

## Three Fractions

This worksheet shows the rules for finding the least common denominator of three fractions. There are six questions for students to complete.
This file has 9 sets of 3 fractions. For each set, students must find the least common denominator.
This worksheet challenges students to find the lowest common denominator between groups of either 2 or 3 fractions.

Practice using LCD to add fractions with unlike denominators.

Subtracting Fractions

Subtract fractions and mixed numbers with unlike denominators.

Least Common Multiples (LCM)

Finding the Least Common Multiple (LCM) is very a similar skill to finding Least Common Denominator (LCD).

## Sample Worksheet Images

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