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Published bySteven Park Modified over 9 years ago
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Understanding Area Models for Multiplication
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Making Sense of Multiplication Using any of the tools available at your table: Model 3 x 4
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Meanings for multiplication Repeated addition xxxx xxxx xxxx Array xxxx Area Counting possibilities (I have 3 shirts and 2 pants, how many outfits?) 3
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With materials at your table, use an area model to show: 6 x 13
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Using an area model to calculate 6 x 13: 13 6 6 x 13 = 78 Making Sense of Multiplication
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Using an area model to calculate 6 x 13: 10 3 6 6 x 106 x3 6 x 13 = 6 x (10 + 3) = (6 x 10) + (6 x 3) = 60 + 18 = 78 Making Sense of Multiplication
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With materials at your table, use an area model to show: 12 x 26
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Using an area model to calculate 12 x 26: 20 6 10 2 10 x 2010x 6 2 x 20 2 x 6 Making Sense of Multiplication 12 x 26 = (10 + 2) (20 + 6) = (10 x 20) + (10 x 6) + (2 x 20) + (2 x 6) = 200 + 60 + 40 + 12 = 312
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9 Mixed Number Multiplication Using a ruler and card, draw a rectangle that is by inches, and find the total number of square inches. Find your answer first by counting, then by multiplying. Compare your answers--are they the same?
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10 Mixed Number Multiplication
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11 Mixed Number Multiplication
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Area model for fractions fractionareamodel.gsp fractionareamodel.gsp 12
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A decimal example: 13
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