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Least Common Denominator - LCD

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

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Calculate the least common denominator for each pair of fractions. This worksheet has 9 problems.
4th and 5th Grades
Common Core
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This file contains 30 task cards (4 per page). Each one has 2 fractions on it. Students find the LCD.
4th and 5th Grades
See also:
Adding 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).

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Common Core Alignment
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