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Repeat the table
12"" fourths make 1 third,
12 inch.orprimes 1 foot. What do feet multiplied by feet, give! Ans. Feet.
What do feet multiplied by inches, give? Ans. Inches.
What do feet multiplied by seconds, give? Ans. Seconds.
What do inches multiplied by inches, give? Ans. Seconds.
What do seconds multiplied by seconds,give? Ans. Fourths.
RULE. How place the multiplier? Ans. Under the multi. plicand, so that feet may stand under feet, inches undcr inches, &c.
With which denomination of the multiplicand do you begin to multiply? Ans. The lowest.
What multiply it by? Ans. The highest denomination in the multiplier.
How place the result of each multiplication? Ans. Feet under feet, inches under inches, &c, of the factors, and in the several products.
How many carry in all cases? Ans. One for every 12.
How place the product of the multiplication by the next highest denomination in the multiplier, and so on to the last? Ans. One figure further towards the right for each multiplication.
How are the several products to be added? Ans. As they then stand.
Is this method of multiplying confined to carry. ing by 12? Ans. It is not.
EXAMPLES Multiply 24 feet by 24 feet?
Ans. 6 3 0
67 sq. feet. 6,25 sq. ft. You have said that feet multiplied by feet gives feet; do you mean square feet or ot?
Why are duodecimals so called? Ans. From duodecimus (Latin)-signifying 12, because in multiplying we carry by 12.
Is it confined to twelves? Ans. It may be greatly extended.
In multiplying pounds, shillings, pence, &c. what do pounds multiplied by pounds give? Ans. Pounds.
What do pounds multiplied by shillings give? Ans. Shillings.
What do shillings multiplied by shillings and so on give, Ans. Twentieths of a shilling, &c.
o. Multiply 2 5
2,25 by 2 5