Education > Complete treatise on practical arithmetic and book-keeping

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NOTATION'.
The following example exhibits a summary of this whole
doctrine:
Quintillions Quadrillions Trillions Billions Millions Units
373,829. 759,761. 235,871. 296,473. 918,651. 4 37,2 56
Note. The first nine characters are called significant figures, tc
distinguish them from the cipher, which of itself is insignificant. Alsc
a number expressing a quantity of one name or denomination, is callec
a simple number, as 20 pounds, or seventeen gallons, or five days; ant
that representing a quantity of several names, is called a compounc
number, as 13 pounds 5 shillings and 6 pence, or 17 gallons and ‘
pints, or 3 hours and 50 minutes.
I. Hftving any number proposed in words, to express the samt
in figures.
Rule.
Write down ciphers to so mapy periods and places as arc
named in the given number ; then, beginning at the left, ob
serve at each place what significant figure is named, and, tak¬
ing away the cipher,, write the significant figure in its place,
Examples.
1. Express in figures, four thousand, one hundred and
seventy-three.
2. Write down in figures. Twenty-three millions, twc
hundred and sixty thousand, nine hundred and thirty.
3. Write in figures, Four thousand and twenty-five mil¬
lions, one hundred and three thousand, and six.
4. Express in figures, Two hundred seventeen thousand
and fifty millions, eight thousand, seven hundred, and six-
teen.
5. Write down in figures. Seventy thousand billions, one
hundred three thousand and fifty millions, three thousand
and eight.
6. Express in figures, Eight hundred trillions, one hun¬
dred seventy-five thousand seven hundred and forty-eight
billions, three hundred thousand millions, five thousand anc
seventy.
II. Having any number expressed in figures, to read the sortie,
or to express it in words.
Role.
Dividg the figures in the given number, as in the genera!
example above, into periods and half periods, by any con-