Mrs. Brown's Fourth Grade Blog

…our learning adventure

Adding & Subtracting Fractions

March16

Students are using pattern blocks to add and subtract fractions. This provides students a visual representation of what it really means to add and subtract fractions that have different denominators. By switching out one larger pattern block for smaller pattern blocks, we have concrete¬†examples of the operation. One method is the “take-away” method. Students pull out the starting pattern blocks, and then remove the amount they are subtracting. What is left is the answer.¬†In the video below, Alexis is demonstrating the “cover up” method of subtraction with fractions.

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