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Prologue 2

THE MULTIPLICATION TABLE


To practice the Table, click here.



× 1 23 45 67 89
1 123 456 789
2 24 68 1012 1416 18
3 36 912 1518 2124 27
4 48 1216 2024 2832 36
5 510 1520 2530 3540 45
6 612 1824 3036 4248 54
7 714 2128 3542 4956 63
8 816 2432 4048 5664 72
9 918 2736 4554 6372 81

The importance of knowing the multiplication table cannot be overstated.  A test of skill are the columns at the end of this page.

The student should practice the table out loud.  To practice the 8 table, for example, say,

"1 times 8 is 8.   2 times 8 is 16.   3 times 8 is 24."

And so on.  (Do not just say, "8,  16,  24, . . .")  Repeat this so that "3 times 8 is 24" begins to sound right.  It is not necessary to make an effort.  Repetition is all that is required to make an impression in the mind.

Practice each column until you can say the answer without thinking.

To see the answer, pass your mouse over the colored area.
To cover the answer again, click "Refresh" ("Reload").
Do the problem yourself first!

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6 × 4 = 24   5 × 4 = 20   7 × 4 = 28   7 × 7 = 49   9 × 8 = 72   9 × 3 = 27
 
7 × 5 = 35   9 × 9 = 81   6 × 3 = 18   9 × 5 = 45   8 × 4 = 32   6 × 8 = 48
 
3 × 9 = 27   4 × 6 = 24   4 × 5 = 20   5 × 7 = 35   4 × 7 = 28   3 × 6 = 18
 
4 × 3 = 12   7 × 8 = 56   8 × 7 = 56   8 × 3 = 24   6 × 7 = 42   8 × 9 = 72
 
5 × 8 = 40   5 × 6 = 30   3 × 4 = 12   4 × 8 = 32   5 × 5 = 25   5 × 9 = 45
 
8 × 6 = 48   8 × 5 = 40   9 × 6 = 54   6 × 9 = 54   7 × 9 = 63   6 × 5 = 30
 
9 × 7 = 63   9 × 4 = 36   6 × 6 = 36   3 × 8 = 24   3 × 7 = 21   7 × 3 = 21
 
8 × 8 = 64   3 × 5 = 15   5 × 3 = 15   7 × 6 = 42   4 × 9 = 36   4 × 4 = 16

Here again are these elementary sums to practice.

8 + 5 = 13   3 + 9 = 12   5 + 9 = 14   6 + 8 = 14   7 + 9 = 16
 
9 + 6 = 15   7 + 6 = 13   8 + 6 = 14   6 + 5 = 11   8 + 4 = 12
 
3 + 8 = 11   5 + 8 = 13   9 + 4 = 13   7 + 4 = 11   6 + 6 = 12
 
4 + 9 = 13   4 + 8 = 12   6 + 9 = 15   8 + 9 = 17   4 + 7 = 11
 
5 + 7 = 12   6 + 7 = 13   9 + 3 = 12   9 + 2 = 11   7 + 7 = 14
 
7 + 8 = 15   9 + 5 = 14   9 + 8 = 17   7 + 5 = 12   2 + 9 = 11
 
9 + 7 = 16   8 + 7 = 15   5 + 6 = 11   8 + 3 = 11   8 + 8 = 16
 
9 + 0 = 9   8 + 0 = 8   0 + 6 = 6   0 + 3 = 3   0 + 0 = 0

Lesson 1:  Powers of 10

Elementary Addition


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