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$12.561 answer.

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APPLICATION.

1. If 9 cocoa-nuts cost $1.12 cts. what will 1 ccst? 2. If 10 lbs. of sugar cost $1.60 cts. what will I lb. come to ?

3. If 11 yards of gingham cost $1.58 cts. what will 1 yard come to?

4. If 12 bushels of rye cost $7.50 cents, what will 1 bushel cost?

5. If 15 lbs. of sugar cost $3.75 c. what will I lb. cost? 6. If 17 yards of muslin cost $21.25 cents, what will 1 yard cost?

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7. If 24 gallons of wine cost $39, what will 1 cost? 8. If 25 gallons of cider cost $1.682 cents, what will 1 gallon cost?

9. If 64 yards of cambric cost $92.80 cents, what will 1 yard cost?

10. If87 barrels of corn cost $223.15 cents, what will

1 barrel cost?

11. If 317 yards of velveret cost $673.623 cents, what will yard cost?

12. If 532 sacks of salt cost $1862, what will 1 cost?

Ans. 0.121

Ans. 0.163

Ans. 0.413

Ans. 0.62
Ans. 0.25

Ans. 1.25
Ans. 1.62}

Ans. 0.183

Ans. 1.45

Ans. 2.561

Ans. 2.12
Ans. 3.50

COMPOUND ADDITION.

Compound Addition is the adding of several sums or quantities of different denominations into one total sum or quantity.

GENERAL RULE.

1. Place the sums or quantities so that those of the same de nomination may stand directly under each other.

2. Begin at the right hand and add up the first column-divide the amount by as many of the same denomination as will make 1 of the next greater.

3. Set down the remainder (if any) under the said column, and add the quotient to the next column.

4. Continue the process to the last column, and cet down the whole amount.

I. OF STERLING MONEY.

The denominations of Sterling Money, arc-
4 farthings (rs.) make 1 penny. d.

12 pence

20 shillings

make 1 shilling. s.

make 1. pound. £.

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II. OF TROY WEIGHT.

The denominations of Troy Weight are

24 grains (grs.) make
(grs.) make 1 pennyweight. dwt. or pwt.
20 pennyweights make 1 ounce.

12 ounces

make 1 pound.

oz.

lb.

Troy Weight is used for weighing jewels, gold, silver, pearls, diamonds, electuaries, liquors, and all other things which are not subject to gross weight.

EXAMPLES.

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DIRECTION.-1. Add up the column of grains as in Simple Addition and divide the sum by 24, (because 24 grains make 1 pennyweight)-set down the remainder (if any) under the column of grains and add the quotient to the column of pennyweights.

2. Add up the pennyweights in like manner and divide the sum by 20, (because 20 dwts make 1 ounce)-set down the remainder (if any) under the column of pwts. and add the quotient to the col

umn of ounces.

3. Add up the ounces in the same manner and divide the sum by 12, (because 12 oz. make 1 pound, Troy Weight)-set down the remainder (if any) under the column of oz. and add the quotient to the column of pounds.

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4. Add up the pounds as before directed, and set down the whole

amount.

5. Cut off the top line, as in Simple Addition, and find the amount of the rest; then, if this last amount and the top line when added together produce a sum equal to the whole amount of the several quantities, the operation is right.

III. OF AVOIRDUPOIS WEIGHT.
The denominations of Avoirdupois Weight are-

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20 hundred weight

make 1 ton.

T.

Avoirdupois Weight is used for weighing cotton, hemp, flax, leather, iron, steel, tobacco, sugar, coffee, and all other articles of merchandize, which are of a coarse and drossy nature, and therefore subject to gross weight.

20 4 28 16 16

T. cwt. grs. lb. ozs. drs. 7 19 3 27 15 15 6 10 2 20 12 14

EXAMPLES.

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DIRECTION.-1. Add up the column of drams, as in Simple Addition, and divide the sum by 16, (because 16 drs. make 1 oz.)—set

the ounces.

the remainder under the column of drams, and add the quotient to 2. Add up the ounces and divide the sum by 16, (because 16 ozs. make 1 lb. Avoirdupois Weight)-set the remainder under the ounces and add the quotient to the pounds. 3. Add up the pounds and divide the sum by 23, (because 28 lbs. make 1 qr. of a cwt.)-set the remainder under the pounds and add the quotient to the quarters. 4. Add up the quarters and divide the sum by 4, (because 4 qrs. make 1 cwt.)-set the remainder under the quarters, and add the quotient to the hundreds weight. 5. Add up the hundreds weight and divide the sum by 20, (because 20 cwt. make 1 ton)-set the remainder under the hundreds weight and add the quotient to the tons. 6. Add up the tons and set down the total sum. 7. Prove the operation by the rule given under Simple Addition, and also under Troy Weight.

IV. OF APOTHECARIES WEIGHT.

The denominations of Apothecaries Weight are

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3 or dr.

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Apothecaries use this weight in compounding their medicine, but buy and sell their drugs by Avoirdupois Weight.

EXAMPLES.

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up the column of grs.

17

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and divide the sum by 20, (because 20 grains make 1 scruple)-set the remainder under the grains and add the quotient to the scruples. 2. Add up the

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scruples and divide the

sum by 3, (because 3 scruples make 1 dr.). set the remainder undrachms. 3. Add up the drs. and divide the sum by 8, (because 8 drachms make 1 ounce, set the remainder under the drs. and add the quotient to the ounces. 4. Add the ounces and divide the sum by 12, (because 12 ounces make 1 lb, Apothecaries Weight)-set the remainder under the oun

der the scruples, and add the quotient to the

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