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latter methods of making calculations are merely short methods of adding and subtracting.
     When we say 4 X 3, we really mean 4 groups of 3's. Add together four 3's-the result will be 12. But we have been taught a method of automatic addition--called the multiplication table--so that we know that 4 X 3=12 without going to the trouble of working out a problem in addition. Knowing the multiplication table you realize immediately that 7 X 8 = 56.

TABLE NO. 1
MULTIPLICATION TABLE

	1	2	3	4	5	6	7	8	9	10
1	1	2	3	4	5	6	7	8	9	10
2	2	4	6	8	10	12	14	16	18	20
3	3	6	9	12	15	18	21	24	27	30
4	4	8	12	16	20	24	28	32	36	40
5	5	10	15	20	25	30	35	40	45	50
6	6	12	18	24	30	36	42	48	54	60
7	7	14	21	28	35	42	49	56	63	70
8	8	16	24	32	40	48	56	64	72	80
9	9	18	27	36	45	54	63	72	81	90
10	10	20	30	40	50	60	70	80	90	100

Just seeing 7 X 8 will cause a mental picture of the number 56 to flash into your mind automatically. In Table No. 1 we have shown the multiplication table as it was first formulated by the Greek philosopher Pythagoras--and shows why it is properly called a table.
     Our tables of measurements, the tables that tell us how many pounds in a ton, how many feet in a mile, how many rods in an acre, how many ohms resistance there is in 1000 feet of No. 24 copper wire, are all examples of this same sort of table,

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Content	©1931, National Radio Institute
Webpage	©1997, Nostalgia Air
Transcriber	Richard Lancaster