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Multiplying By Multiples of 10 © 2012 Elizabeth Hill

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What are we learning? Our Standard Says Students will further develop their understanding of multiplication of whole numbers and develop the ability to apply it in problem solving by understanding the effect on the product when multiplying by multiples10. © 2012 Elizabeth Hill

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What are we learning? I can correctly multiply a number by 10’s and 100’s numbers. © 2012 Elizabeth Hill

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A 5 rd Grader’s Best Friend These are called factors! Factors are the numbers you are multiplying. These are products! © 2012 Elizabeth Hill

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Can you use what you know to find the missing numbers? Hint Find which factor is easiest to count by: the one on top or the one on bottom. © 2012 Elizabeth Hill

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What are mulitples of 10? The multiplies of 10 are the numbers you get when counting by 10. © 2012 Elizabeth Hill

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To be able to multiply by multiples of 10, you have to know your basic facts. 30 x 6= 50 x 3= 400 x 7= 800 x 4= © 2012 Elizabeth Hill

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Introducing… Zero the Hero © 2012 Elizabeth Hill

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Zero the Hero Zero is the hero. He just won’t stop! All you do is count him, At the top! You add those zeros, To the basic fact, And you will get the answer, Just like THAT!

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How can Zero the Hero help you? 30 X 4 Zero is the hero. He just won’t stop! All you do is count him, At the top! You add those zeros, To the basic fact, And you will get the answer, Just like THAT! 1 Zero X 4=120 © 2012 Elizabeth Hill

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How can Zero the Hero help you? 50 X 6 Zero is the hero. He just won’t stop! All you do is count him, At the top! You add those zeros, To the basic fact, And you will get the answer, Just like THAT! 1 Zero X 6=300 © 2012 Elizabeth Hill

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How can Zero the Hero help you? 70 X 3 Zero is the hero. He just won’t stop! All you do is count him, At the top! You add those zeros, To the basic fact, And you will get the answer, Just like THAT! 1 Zero X 3=210 © 2012 Elizabeth Hill

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How can Zero the Hero help you? 90 X 8 Zero is the hero. He just won’t stop! All you do is count him, At the top! You add those zeros, To the basic fact, And you will get the answer, Just like THAT! 1 Zero X 8=720 © 2012 Elizabeth Hill

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How can Zero the Hero help you? 60 X 7 Zero is the hero. He just won’t stop! All you do is count him, At the top! You add those zeros, To the basic fact, And you will get the answer, Just like THAT! 1 Zero X 7=420 © 2012 Elizabeth Hill

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Try These With Your Partner 40 X 8 20 X 5 50 X 9 60 X 3 90 X 7 40 X 5 © 2012 Elizabeth Hill

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Time for a Challenge 300 X 4 Zero is the hero. He just won’t stop! All you do is count him, At the top! You add those zeros, To the basic fact, And you will get the answer, Just like THAT! 2 Zeros X 4=1,200 © 2012 Elizabeth Hill

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Time for a Challenge 500 X 8 Zero is the hero. He just won’t stop! All you do is count him, At the top! You add those zeros, To the basic fact, And you will get the answer, Just like THAT! 2 Zeros X 8=4,000 © 2012 Elizabeth Hill

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Time for a Challenge 900 X 6 Zero is the hero. He just won’t stop! All you do is count him, At the top! You add those zeros, To the basic fact, And you will get the answer, Just like THAT! 2 Zeros X 6=5,400 © 2012 Elizabeth Hill

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Tricky, Tricky 7000 X 6 Zero is the hero. He just won’t stop! All you do is count him, At the top! You add those zeros, To the basic fact, And you will get the answer, Just like THAT! 3 Zeros X 6=42,000 © 2012 Elizabeth Hill

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Test Practice There are 50 chips in a bag. If David buys 7 bags of chips, how many chips will he have? a.35 b.350 c.300 d.120 © 2012 Elizabeth Hill

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Test Practice If 9 x 7 is 63, then what is 900 x 7? a.63 b.630 c.6300 d.1600 © 2012 Elizabeth Hill

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Test Practice When baking chocolate chip cookies, Mrs. Hill wanted to put 20 chocolate chips in each cookie. If she bakes 30 cookies, how many total chocolate chips will she need? a.50 b.60 c.600 d.500 © 2012 Elizabeth Hill

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