« ΠροηγούμενηΣυνέχεια »
CASE III. When there are cyphers on the right hand of either or bath of the factors, neglect those cyphers; then place the significant figures under one another, and multiply by them only, and to the right hand of the product, place as many cyphers as were oniitted in both the factors.
7065000 X8700=61465500000 749643000 x 695000=521001885000000 360000x1200000-432000000000
CASE IV. When the multiplier is a composite number, that's when it is produced by multiplying any two numbers in the table together; multiply first by one of those figures and that product by the other; and the last product wil be the total required.
Multiply 41364 by 55. x5=,
289548 Product of
1447740 Product of 35
2. Multiply 764131 by 48. S. Multiply S42516 by 56. 4. Multiply 209402 by 72. 5. Multiply 91738 by 81. 6. Multiply S4462 by 108. 7. Mirltiply 615243 by 144.
CASE V. To multiply by 10, 100, 1000, &c. annex to the ntul Aplicand all the cyphers in the multiplier, and it will make the product required. 1. Multiply 365 by 10.
Ans. 3650 2. Multiply 4657 by 100.
Ans. 465700 3. Multiply 5224 by 1000.
Sns. 5224000 4 Multiply 26460 by 10000. Ans. 264600000
EXAMPLES FOR EXERCISE. 1. Multiply 1203450 by 9004. Anrs. 10835863800 2. Multiply 9087061 by 56708. Ans.. 515309055188 3. Multiply 8706544 by 67089. Ans. 584113330416 4. Multiply 4321209 by 123409. Ans. 53327608149) 8. Multiply 3456789 by 567090. Ans. 1960310474010 6. Multiply 8496427 by 874359. ins, 7428927415293
Application and Use of Multiplication. In making out bills of parcels, and in finding the value of goods; when the price of one yard, pound, &c. is give en (in Federal Money) to find the value of the whole quantity.
RULE. Multiply the given price and quantity together, as in whole numbers, and the separatrix will be as many figures from the right hand in the product, as in the given price.
1. What will 35 yards of broad. ? 8. d. c. m. eloth come to, at
$ 3, 4 9 6 per yard ?
17 4 8 0 104 8 8
Ans. $122, 3 6 0=122 dol
[lars, 56 cents. 2. What cost 35 Ib. cheese at 8 cents
ars. $2 802 dollars, 80 cents.
per lb. ?
3. What is the value of 29 pairs of men's shoes, at 1 dollar 51 cents per pair ? Ans. $43, 79 cents. 4. What cost 131 yards of Irish linen, at 38 cents per
Ans. $49, 78 cents. 5. What cost 140 reams of paper, at 2 dollars 33 cent:
Ans. 8399. 6. What cost 144 lb. of hyson tea, at 3 dollars 5l cents
Ans. $505, 44 cents. 7. What cost 94 bushels of eats, at 33 cents per busti. el?
Ans. 231, 2 cents. 8. What do 50 firkins of butter come to, at 7 dollars 14 cents
Ans. 8357. 9. What cost 12 cwt. of Malaga raisins, at 7 dollars s1 cents per cwt. ?
Ans. 887, 72 cents. 10. Bought 37 horses for shipping, at 52 dollars per head ; what de they come to ? ;
ins. 81924. 11. What is the amount of 500 lbs. of hog's-lard, at 15 cents per lb. ?
Ans. $75. 12. What is the value of 75 yards of satin, at 3 dollars 75 cents per yard ?
ins. $281, 25 cents. 13. What cost 367 acres of land, at 14 dols. 67 cents
Ans. $5383, 89 cents. 14. What does 857 bls. pork come to, at 18 dols. 93 cents per bl. 2
Ans. $16223, 1 cent. 15. What does 15 tons of Hay come to, at 20 dols. 78 cts. per ton ?
Ans. $311, 70 cents. 16. Find the amount of the following
BILL OF PARCELS,
New-London, Marco 9, 1814. Mr. James Paywell, Bought of William Merchant.
$. cts. 28 lk. of Green Tea, at 2, 15 per lb. 41 lb. of Coffee,
at 0, 21 34 lb. of Loaf Sugar, at 0, 19 13 cwt. of Malaga Raisins, at 7, 31 per crt. 55 firkins of Butter, at 7, 14 per fir. 27 pairs of worsted Hose, at 1, 04 per pair. 94 hushels of Oats, at 0, 33 per bush. 29 pairs of men's Shoes, at 1, 12 per pair.
Amount, 8511, 78, Recciyeul payment in full,
per acre :
A SHORT RULE. NOTE. The value of 100 lbs. of any article will be just as many
dollars as the article is cents a pound. For 100 lb. at 1 cent per lb.=100 cents=1 dollar.
100 lb. of beef at 4 cents a lb, comes to 400 cents=4 dollars, &c.
DIVISION OF WHOLE NUMBERS. SIMPLE DIVISION teaches to find how many times one whole number is contained in another; and also what rernains; and is a concise way of performing several subtractions.
Four principal parts are to be noticed in Division : 1. The Dividend, or number given to be divided. 2. The Divisor, or number given to divide by.
3. The Quotient, or answer to the question, which shows how many times the divisor is contained in the dividend.
4. The Remainder, which is always less than the divisor, and of the same name with the Dividend.
RULE. First, seek how many times the divisor is contained in as many of the left hand figures of the dividend as are just necessary, (that is, find the greatest figure that the divisor can be multiplied by, so as to produce a product that shall not exceed the part of the dividend used) when found, place the figure in the quotient; multiply the di. visor by this quotient figure; place the product under that part of the dividend used; then subtract it therefrom, and bring down the next figure of the dividend to the right hand of the remainder ; after which, you must seek, multiply and subtract, till you have brought down every figure of the dividend.
Proov. Multiply the divisor and quotient together and add the remainder if there be any to the producti il the work be right, the sum will be equal to the diviceud.*
* Another method which some make use of to prove diri sion is as follows : viz. Add the remainder and all the products of the several quotient figures multiplied by the divisas
EXAMPLES 1. How many times is 4 2. Divide $656 dollars contained in 9391 ?
equally among 8 men. Divisor, Div.Quotient. Divisor,Div.Quotient. 4)9391( 2347
0 Rem. together, according to the order in which they stand in the work; and this sum, when the work is right will be equal to the dividend. A third method of proof
by excess of nines is as follows, viz. 1. Cast the nines out of the divisor and place the excods on the left hand.
2. Do the same with the quotient and place it on the right hand.
3. Multiply these two figures together, and add their product to the remainder, and reject the wines and place the use cess at top.
4. Cast'the nines out of the dividend and place the excess at bottom.
NOTE. N the gum is right, dia top and bottom liggies will le alice