powerpoint 18 multiplication
TRANSCRIPT
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Learning the Multiplication Facts
Part 1
3 x 3 = 9 4 x 8 = 32
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Multiplication Factsare easiest to learn when...
� You find patterns.� You use rhymes.� You use stories.� You relate them to what
you already know.
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Zero Pattern0 times any number is 0
� 0 x 3 = 0� 0 x 7 = 0� 0 x 4 = 0� 0 x 1 = 0� 0 x 0 = 0� 0 x 9 = 0
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What is
0 x 8 = 0
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One’s Pattern1 times any number is the
same number
� 1 x 3 = 3� 1 x 7 = 7� 1 x 4 = 4� 1 x 1 = 1� 1 x 2 = 2� 1 x 9 = 9
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What is
1 x 5 = 5
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Two’s Pattern2 times any number is that
number doubled
� 2 x 3 = 6� 2 x 7 = 14� 2 x 4 = 8� 2 x 1 = 2� 2 x 2 = 4� 2 x 9 = 18
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What is
2 x 5 = 10
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Five’s Pattern - Step 1Cut the number you are
multiplying in half
� 5 x 3 = 1.5� 5 x 7 = 3.5� 5 x 8 = 4� 5 x 1 = .5� 5 x 2 = 1� 5 x 6 = 3
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Five’s Pattern - Step 2 If you are multiplying an odd
number, drop the decimal point
� 5 x 3 =� 5 x 7 =� 5 x 5 = � 5 x 1 =� 5 x 9 =
1. 53. 52. 5
. 54. 5
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What is
5 x 7 =3 5
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What is
5 x 3 =1 5
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What is
5 x 9 =4 5
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What is
5 x 5 =2 5
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Five’s Pattern - Step 3 If you are multiplying an even
number, just add a zero
� 5 x 2 =� 5 x 6 =� 5 x 4 = � 5 x 8 =� 5 x 10 =
1 03 02 0
05 04
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What is
5 x 8 =4 0
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What is
5 x 6 =3 0
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What is
5 x 4 =2 0
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What is
5 x 2 =1 0
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Nine’s Pattern - Step 1Subtract 1 from number you
are multiplying
� 9 x 3 = 2� 9 x 7 = 6� 9 x 8 = 7� 9 x 1 = 0� 9 x 2 = 1� 9 x 6 = 5
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Nine’s Pattern - Step 2Add a 2nd number that totals
nine with the 1st number
� 9 x 3 = 2� 9 x 7 = 6� 9 x 8 = 7� 9 x 1 = 0� 9 x 2 = 1� 9 x 6 = 5
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What is
9 x 7 =6 3
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What is
9 x 8 =7 2
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What is
9 x 9 =8 1
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What is
9 x 6 =5 4
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What is
9 x 5 =4 5
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What is
9 x 3 =2 7
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What is
9 x 4 =3 6
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What is
9 x 2 =1 8
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Six’s Pattern (even #’s only)Step #1 Cut the number you
are multiplying in half.
� 6 x 2 = 1� 6 x 4 = 2� 6 x 6 = 3� 6 x 8 = 4
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Six’s Pattern (even #’s only)Step #2 The number you aremultiplying by 6 is the 2nd #.
� 6 x 2 = 1� 6 x 4 = 2� 6 x 6 = 3� 6 x 8 = 4
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What is
6 x 6 =3 6
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What is
6 x 2 =1 2
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What is
6 x 8 =4 8
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What is
6 x 4 =2 4