Subtracting Mixed Numbers

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Presentation transcript:

Subtracting Mixed Numbers M5N4 G: Add and subtract common fractions and mixed numbers with unlike denominators.

Subtracting Mixed Numbers The steps for subtracting mixed numbers are a little bit different than adding mixed numbers. Put on your thinking cap!

Step 1: Find a common denominator for your fractions. 5 2 = 8 3 12 5 2 = 8 3 12 3 3 = 9 4 12 Remember to ask: What is the least common denominator of your two fractions?

Step 2: Check to see if you can subtract your fractions. 5 2 = 8 3 12 5 2 = 8 3 12 3 3 = 9 4 12 Can you subtract 8-9? If NO, we have to rename our whole number.

Step 3: Rename your whole number as a whole number and fraction. 4 12 12 5 2 = 8 3 12 3 3 = 9 4 12

Step 4: Put your renamed whole number and your common fraction together. 4 12 12 5 2 = 8 4 20 3 12 12 3 3 = 9 - 3 9 4 12 12

Step 5: Subtract your fractions and then your whole numbers. 4 20 12 4 20 12 3 9 1 11