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Success in addition and multiplication depends upon the ability to
recall these primary facts accurately and rapidly. All
mathematics starts with this solid base.
Did you know that there are 45 addition
combinations using the nine basic digits adding two digits at a
time and there are 36 multiplications combinations as well?
Test and time yourself and your students on these basic
combinations. I would like to keep track of your times
(in seconds) if you would care to e-mail me your
results. Practice, practice, practice.
Addition Combinations
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2
+ 8
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4
+ 5
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2
+ 9
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2
+ 3
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1
+ 7
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3
+ 3
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6
+ 9
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1
+ 3
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2
+ 5
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3
+ 9
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1
+ 1
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5
+ 5
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4
+ 6
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3
+ 7
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5
+ 6
|
|
1
+ 9
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8
+ 9
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4
+ 8
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2
+ 2
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5
+ 7
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|
1
+ 6
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7
+ 7
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2
+ 4
|
1
+ 2
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6
+ 8
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3
+ 6
|
7
+ 9
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5
+ 9
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3
+ 8
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6
+ 6
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|
3
+ 4
|
5
+ 8
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4
+ 7
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2
+ 6
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8
+ 8
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|
1
+ 4
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1
+ 8
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4
+ 4
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2
+ 7
|
6
+ 7
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|
1
+ 5
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3
+ 5
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7
+ 8
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4
+ 9
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9
+ 9
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Multiplication
Combinations
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2
x 2
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6
x 5
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9
x 8
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6
x 2
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8
x 8
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9
x 4
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6
x 3
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6
x 6
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9
x 2
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3
x 3
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7
x 7
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7
x 3
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9
x 5
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9
x 9
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6
x 4
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8
x 3
|
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8
x 7
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5
x 4
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7
x 5
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5
x 2
|
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9
x 6
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4
x 4
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5
x 3
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8
x 5
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7
x 4
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3
x 2
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6
x 7
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8
x 2
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9
x 3
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5
x 5
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4
x 2
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8
x 6
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4
x 3
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9
x 7
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8
x 4
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7
x 2
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My timed results were:
mailto:teacher@thenewhomeschooler.com
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