Education > Complete treatise on practical arithmetic and book-keeping

8
. SIMPLE MULTIPLICATION.
fight of the product place as many ciphers as are in be
factors.
So to multiply 390720400 by 406000;
Having written the terms as are here annexed,
and multiplied by the two significant figures of
the multiplier, to the sura of the two products
subjoin the five ciphers which are on the right- —r
hand’ of the two factors.
1586S2482400C
F.xjmplts.
1. Multiply 718603100 by 57. Ans. 409603938C
2. Required the product of 7Q100 and 9001635.
Ans. 6310H61350
3. What is the product of 9030100 and 21000?
Ans. 18963210000
4. What is the product of 7030 and 815036000?
Ans. 527970308000
So that, if any number is to be multiplied by 1 with t
phers annexed, the product will be found by only annexii
the ciphers to the figures of the multiplicand.
Examples.
1. The product of 71 and 10 is 710.
2. The product of 2103 and 100 is
3. The product of 5930700 and 1000 is
III. When the mul iplier is the product of 2 or mo:
numbers in the table* it is often of advantage to multipl
continually by those numbers, instead of it.
Thus, to multiply 160430^00 by 1Q800
Because the component parts of 103 are 12 and
9, that is 9 tiroeSs‘12 produce 108 ; therefore mul¬
tiply first by 12, and that product by 6 : and to the
Tst product affix the four ciphess which are on
the right of the two factors.
1732G526400C
Examples.
1. Required the product of 51307298 and 56, or 7 times!
Ans. 287320868!
2. What is the product of SI704592 and 36 ?
Ans. 11413653R
3. What is the product of 29753804 and 72. ?
A'ns. 214227388$
4. What is the product of 7128368 and 96 ?
Ans. 684323325