A Multiplication EBook

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A MultiplicationE-Book
Marty Mouse

• Created by Mrs. Miller

Math SOL 3.9
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• Marty Mouse loves numbers. He loves to count
  them.

He loves to subtract them and add them together.
He even loves to use them to tell the time.
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• Marty lives with his big family. In his family
  are his mom and dad, Melanie and Marvin

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his 3 brothers, Mike, Merlin, and young Mark
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and his 4 sisters, Maria, Marcy, and the twins
Mindy and Mandy.
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One day Marty couldnt go outside the mouse hole
because Crissy the Cat was sleeping nearby.
Instead he decided to wander around his mouse
house and count things he saw.
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He had 12 chairs, one for each family member and
extras for company. (How many mice are in his
family?)
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Marty also counted 10 beds.
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• Martys family owned 6 cars. His mom and dad
  both had a car. His two older brothers, Mike and
  Merlin, and his twin sisters drove cars, too.
  Marty was too young to drive yet.

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• Martys family LOVED cheese, so they had lots of
  it. They had so much cheese that they had to
  keep it in 3 refrigerators.

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• Marty decided he wanted to count to see how much
  cheese they had, so he started in the first
  refrigerator. There were 9 pieces of cheese.

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• Then he counted the cheese in the second and
  third refrigerators. They also had 9 pieces of
  cheese each.
• Marty wondered how much cheese that was
  altogether. He started to count all the cheese,
  but kept losing count. This was a problem and
  Marty became very frustrated.

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• Right about that time, along came Mike, Martys
  oldest brother, strolling through the kitchen.
  He could see how frustrated Marty looked and he
  asked what was the matter.

Whats up, dude?
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• Marty explained his problem to his brother, who
  said, Not to worry little mouse. Mike to the
  rescue! Dont you love to add numbers?
• This gave Marty an idea. I can add 9 plus 9
  plus 9 more to find the answer! he exclaimed.
  So quickly he started adding.

9 plus 9 is 18 and 18 9 is um
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• 27!, said Marty.
• Thats right, said Mike. Good for you. I
  guess we can now call you the Multiplying
  Mouse.
• Huh? Marty was puzzled. What is multiplying?
  

?
?
?
?
?
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• Mike explained, When you multiply numbers it is
  like adding the same number over and over again.
  Of course, this only works when you have equal
  sets of things to count. For example, like those
  4 baskets of apples mom has on the counter. Each
  basket has 5 apples. You can add 5 5 5 5
  which is the same as multiplying 4x5.

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• Wow!, exclaimed Marty. That is really neat.
• These are the facts, dude. And it is much,
  much easier once you practice and memorize these
  facts. There is another way to figure out the
  totals (called products). You can make an
  array.
• Marty wanted to know what an array was so Mike
  explained

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• An array is a picture you can make. Lets take
  the cheese, for example. Our kitchen floor is a
  good way to start. It is made of squares. Lets
  put each piece of cheese in rows on the squares.
  (By the way, dont try this at home- it might
  make your mom very unhappy.) ?
• How many pieces should we put in each row?,
  Marty wondered.
• Lets make a row for the cheese in each
  refrigerator

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• Marty arranged the cheese and saw that it was
  much easier to count, but he made a promise to
  learn his multiplication facts very soon. He
  knew this would make it so much easier!

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• Marty was so excited about learning
  multiplication that he looked for other things in
  his mouse house to multiply.
• Now its your turn. Martys family had a lot of
  chairs. The chairs are sorted into groups. Make
  an array to show how many chairs there are.

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• His family had several beds. What kind of array
  can you make to show the number of beds he had?
  What is the multiplication sentence?

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• Help Marty figure out how many wheels there are
  on the cars they own. Make an array to show this
  product.

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• Thanks for helping Marty figure out these
  problems. Now you are a Multiplying Mouse, too!