# Adding And Subtracting Fractions With Unlike Denominators

СОДЕРЖАНИЕ: Essay, Research Paper Adding and Subtracting Fractions With Unlike Denominators To add and subtract fractions with unlike denominators, you must first copy down the problem, and make sure it’s setup horizontally. Be sure to include your addition or subtraction signs between your two fractions. After that, you have to find your Lowest Common Denominator (LCD), which you find by looking at a multiplication chart, and following the two numbers that are the denominators, and the first two numbers that are the same is your LCD (if no two are the same, use the chart like a multiplication chart, and use the number in the middle as your LCD).

Essay, Research Paper

Adding and Subtracting Fractions With Unlike Denominators

Make sure that the fraction can be reduced, and if it can be reduced, reduce it! You reduce it by finding your Greatest Common Factor (GCF) and dividing both the numerator and denominator by the GCF. You find the GCF by finding all of the factors, and the two factors that the numerators and denominators have that are the highest number is your GCF. If the greatest common factor is one, than the fraction is already in lowest terms.

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Adding and Subtracting Fractions with Unlike Denominators  [ВИДЕО]

Math Antics - Adding and Subtracting Fractions  [ВИДЕО]