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2.1 Patterns of Multiplication Objective: 6.C.1.a Multiply Whole Numbers Assessment limits: Use a 3-digit factor by any other factor with no more than 2-digits and whole numbers (0-10,000)

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Multiplication Repeated Addition

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Factor A number multiplied to give a product; for example, 3 and 5 in 3 X 5

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Product The answer in a multiplication problem

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Use basic facts and patterns to find products Find 400 X 700 Basic fact is 4 X 7 = 28 Pattern: 4 X 70 = 280 4 X 700 = 2800 40 X 700 = 2,8000 400 X 700 = 280,000

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You can count the zeros in the factors Step 1: Find the Basic Fact 4 X 7 = 28 Step 2: Count the number of zeros in each factor. 400 X 700 2 Zeros + 2 zeros= 4 zeros Step 3: Write the zeros to the right of the product in Step 1 400 X 700 = 280,000 Product from Step 1 Zeros From Step 2

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Think: Sometimes there is an extra zero in the product. Can anyone give me an example? Basic Fact 5 X 6 = Pattern: 5 X 60 = 300 5 X 600 = 3000 50 X 600 = 3,0000 500 X 600 = 300,000 3030

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Multiply 4 X 400 = 1,600

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Multiply 6 X 50 = 300

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Multiply 100 X 12 = 1,200

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Copy and Complete 2 X 40 = 80 2 X 400 = 800 20 X 400 = 200 X 400 = 8000 80,000

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Copy and Complete 7 X 50 = 7 X 500 = 3500 70 X 500 = 700 X 500 = 35000 350,000 350

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Copy and Complete 8 X 120 = 8 X 1200 = 80 X 1200 = 800 X 1200 = 96000 960,000 960 9600

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Copy and Complete 5 X 60 = 5 X 600 = 3000 50 X 600 = 500 X 600 = 30000 300,000 300

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