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# Finding Factor Pairs and Listing Factors Fill in the Blank

Subject
Common Core Standards
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4.0
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Word Document File

86 KB|5 pages
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Product Description
This is a worksheet with a table for listing all factors for all numbers (2 through 100). It has some of the factors listed for each number, and the students must find the factors to match the given ones. For example, 48 has 1 x __ 2 x __ 3 x ___, etc. I let my students use manipulatives to make arrays with the number of rows given (2 rows to figure out how many go in each row, 3 rows to figure out how many go in each row, etc.), with the hope that they start to recognize patterns (like not having to make an array with one long row because they should already know how many items it would be in that row). I broke my students down into small groups or pairs and let each group do a few of the numbers while the other groups did a different set so they could then report back when they had found all factor pairs (and the whole class could fill in the whole table). We then used this completed list to discuss patterns we observed and notice that some numbers only had one factor pair (thus helping students see the difference between prime and composite numbers). This activity can be used as follow-up after introducing the topic of factor and factor pairs with the Power Point "Finding Factors and Factor Pairs." NOTE: I gave some of the factors because many students had not memorized their basic multiplication facts and it took way too long when they tried to make 2 rows, then 3 rows, then 4 rows, etc., for numbers that weren't evenly divisible by most of those smaller numbers.
Total Pages
5 pages
Not Included
Teaching Duration
90 minutes
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