5. At $.03 per mile a ticket from D to G costs $9.45; find the distance.

6. How many times does $12 contain 3 cents?

To the dividend annex as many noughts in decimal places as are required to equal the number of decimal places of the divisor.

7. How many times does 4.2 contain .006?

495. Written Exercises.

.03) 12.00

400

10.

8. 20.16.42

Multiply 5.45 by .016, and prove the work by dividing the product by the multiplicand.

9. 5.04÷.21

496. To divide decimals by decimals:

Divide as in whole numbers.

Point off in the quotient as many decimal places as the number of decimal places in the dividend exceeds the number of decimal places in the divisor, prefixing noughts when necessary.

502. Oral Exercises.

I.

PER CENTS

What part of a dollar is 1 cent? 3 cents?

2. How many hundredths of a dollar is 9 cents? Read: 3. Seven hundredths of one dollar.

4. To×$1. 5. .07× $1.

6. 7% of $1.

503. 17×$1, .07× $1, and 7% of $1, all mean the same. The sign % is read per cent, and

7.

means hundredths.

How

many hundredths of a dollar is a dime? 8. What per cent of a dollar is a nickel?

9.

What per cent of 50 is 5? of 25 is 5? 10. Of what number is 6 six per cent? 11. Of what number is 5 ten per cent? 12. Of what number is 5 twenty per cent?

505. Written Problems.

1. A man borrows $100 for a year at 5 %. How much does he pay for the use of the money ?

5% of $100.05 $100 = $5.

The borrower pays $5, and also pays back the $100.

2. A man lends another $100 for 2 years at 5 % per year. How much does the borrower pay for the use of the money?

2 × .05 × $100 = ?

3. A man borrowed $200 for a year, and at the end of the year paid $10 for the use of the money; what per cent did he pay? (20%=150=5%.)

4. A man bought a horse for $100, and sold him for $115; what per cent did he gain?

=

10%-15%.

5. There are 200 trees in an orchard and 47 % of them are apple-trees; how many apple-trees?

6. A dealer bought eggs at 20 cents a dozen and sold them at a profit of 50%; what did he get a dozen?

7. Mr. Lewis borrowed $500. By adding 4% of $500 to $500, find what he paid at the end of the year.

8. Mr. Jones borrowed $500 at 4% a year. Find what he paid at the end of 6 months.

9. Mr. Smith borrowed $600 at 5% a year; adding 15% of $600 to $600, find what he paid at the end of

3

years.

10. If 5

II.

years is 50% of a girl's age, how old is she?

11. If a man pays $40 for a cow, and sells her for $36, what per cent does he lose?

DENOMINATE NUMBERS

506. Oral Exercises.

1. Rule a square figure 6 inches to the side.
2. Rule lines across, 1 inch apart, as below.
3. Rule lines across the other way, 1 inch apart.
4. How many square inches are in

the figure?

5. Six times 6 square inches are how many square inches?

6. Three times 3 square inches are

how many square inches?

7. Ten times 10 square miles are how many square miles?

507. Written Problems.

1. A city block is 297 feet square; how far is it around the block?

2. A brick is 8 inches long and 4 inches wide; how many such bricks would cover a table 32 inches square?

3. Find the number of square inches in a sheet 663 inches long and 54 inches wide.

4. A floor is 18 feet long and 14 feet wide; how many square feet in the floor?