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When fractions have the same denominator they are  like or similar fractions . You can add or subtract fractions when you have  like or similar fractions . These are all  like or similar fractions .

4            7            6            3            2            5 5          5          5          5          5          5

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Steps: Make sure that you have like / similar fractions. Add the numerators. Write the sum over the denominator. Write the answer in simplest form.

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Steps: Make sure that you have like / similar fractions. Subtract the numerators. Write the difference over the denominator. Write the answer in simplest form.

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Unlike /  Dissimilar fractions  have different denominators.    Adding or subtracting with  unlike fractions   isn ’ t that different from adding or subtracting  like fractions .  You just have to find what their denominators have in common.

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Steps: Find  a common multiple that will go into both denominators. Multiply the numerator and denominator by the same number so the denominator is the same as the common multiple. WHAT EVER YOU DO TO THE BOTTOM YOU HAVE TO DO TO THE TOP!

Now you ’ re ready to use these fractions for addition and subtraction!

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Improper fractions are easy! Just treat them as if they ’ re normal fractions. That ’ s it!

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There are two ways to change mixed numbers so you can add or subtract. Change the mixed number into an improper fraction.   Change just the fraction and leave the whole number alone.

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Steps: Add the fractions together. Add the whole numbers.

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Steps: Change the unlike fractions to like fractions. Add the fractions. Add the whole numbers. If the fraction is improper, change it to mixed and add the whole numbers.

Adding and Subtracting Fractions

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