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Differences of Fractions with Different Denominators

Subtracting equivalent fractions with LCD

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.
• Video

Subtracting Fractions Introduction - Positive Only

by CK-12 //basic

Explains how to subtract fractions with like and unlike denominators. It explains why we must have a common denominator when subtracting fractions.

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• Video

Subtract Fractions with Unlike Denominators

by CK-12 //basic

Provides two examples of subtracting fractions with unlike denominators.

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