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Leçon 1 chapter 6

Page history last edited by Jonathan 7 years, 8 months ago

 

Multiplication Strategies                                        

 

 

 http://mathisfun.com

 

 

1) Using an array (by drawing or using manipulatives)

 

An array shows objects arranged into equal rows.

To find 6 X 3, make an array of 6 rows of 3

 

       ...

       ...

       ...

       ...

       ...

       ...

 

 

 

6 X 3 = 18

 

2) Doubling

 

When you double a number you are multiplying by 2.

Ex. 6 X 9 =

 

              ...                   ...

              ...                   ...

              ...                   ...

              ...         +        ...

              ...                   ...

              ...                   ...

 

 

First find 3 X 9, then double it

(3 X 9 = 27) + (3 X 9 = 27)

(3 X 9) + (3 X 9) = 27 + 27 = 54

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