Least Common Denominator - LCD
This page has printable worksheets on finding the Least Common Denominator, LCD, or Lowest Common Denominator.
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.
4th and 5th Grades
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Calculate the least common denominator for each pair of fractions. This worksheet has 9 problems.
4th and 5th Grades
This file contains 30 task cards (4 per page). Each one has 2 fractions on it. Students find the LCD.
4th and 5th Grades
This worksheet shows the rules for finding the least common denominator of three fractions. There are six questions for students to complete.
4th and 5th Grades
This file has 9 sets of 3 fractions. For each set, students must find the least common denominator.
4th and 5th Grades
This worksheet challenges students to find the lowest common denominator between groups of either 2 or 3 fractions.
4th and 5th Grades
Adding Fractions
Practice using LCD to add fractions with unlike denominators.
Subtracting FractionsSubtract 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).
