Εικόνες σελίδας
PDF
Ηλεκτρ. έκδοση
[blocks in formation]

Is .098 the product of .7 (the divisor) and .14 (the quotient)? Does it contain as

many decimal places as both the factors.

The dividend contains 3 decimal places, the divisor 1. How many must the quotient contain?

There must be as many decimal places in the quotient as the number of such places in the dividend exceeds the number in the divisor.

[merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small]

370. Another name for hundredths is per cent. Instead of saying 5 hundredths of $250, we may say 5 per cent of $250.

To find 1 hundredth of a number we divide it by 100. Hence, to find 1 per cent of a number we divide the number by 100.

What is the easiest way to divide by 100?

1. Find 1 per cent of $125.

3.

$125 100 = $1.25.

2. Find 1 per cent of $275. Of $325. Of $152.50. What is 1 per cent of $200? What is 2 per cent of $200?

4. Find 2 per cent of $300. Of $500. Of $250.

5.

What is 3 per cent of $217.50? Of $187.50?

6.

When you know what 1 per cent of a number is, how do you find 4 per cent of the number?

7. Find 4 per cent of $732.50.

[blocks in formation]

9.

10.

Of $364.25.

Of $87.25?

Find 5 per cent of 200. Of 800. Of 24.5.

What per cent of a number equals 100 hundredths of the number?

11. Multiply $125 by .05, and compare the product with 5 per cent of $125.

12. Find 6 per cent of $240; multiply $240 by .06. Are the results equal?

13. Compare .04 X $325 with 4 per cent of $325. Are they equal?

14. In how many ways can you find a per cent of a number?

15. If you borrow money, do you have to pay anything for its use?

16. Find out at home all you can about what is paid for the use of money.

[merged small][merged small][graphic][subsumed][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small]

Instead of hundredths we may use the term per cent, because per cent means hundredths.

Then what per cent of the square is A? A + B?

How many per cent are there in the square? In anything?

One hundred per cent of a number is the number itself.

What per cent of the square is above the line RD? What part of anything is 50 per cent of it?

What part of the square is shaded? What per cent of it is shaded?

How many small squares in 10 per cent of the large square? In 20 per cent?

The sign % stands for the term per cent, and means either per cent or hundredths. Thus, 5% of the square means 5 per cent, or 5 hundredths of it.

What per cent of the square is A+B+C+D+ E? What part of the square is 10% of it? 20%? 40%? 50% 60% 6%?

Cover 25% of the square. What % is not covered?

372. What % of $100 is $5? $10? $25?

Draw a rectangle and divide so as to show 50% of it. 25%. 121%.

Divide a square so as to show that 50%

25% = 4.

1, and that

Draw a line an inch long, and another line 50% as long. This line is an inch long.

another line 100% as long.

How many times a number is 200% of it? 300%?

of a number is what % of it?

Draw

How do you find 1 hundredth, or 1%, of a number?

What is the effect of moving the decimal point two places

to the left?

When you have found 1% of a number, how do you find 3% of it? 5%?

Find 1% of 200. Of 500. Of 250. Of 12.5.

Find 5% of 200.

Of 125. Of 315. Of 41.2.

State the simplest way of finding 10%, or, of a number. What is the effect of moving the decimal point one place to the left?

Find 10% of 50. Of 12.5. Of 345. Of 624.

What is the ratio of 200% to 100%? 100% to 50%? 25% to 100%?

What is 100% of 5¢? Of $10? Of 25 gal.?

373. 1. Find 21% of $400.

[blocks in formation]

374. Be sure you understand the following:

100 % of a number all of it.

[ocr errors]
[merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][ocr errors][merged small][merged small][merged small]

2.

What is 25% of 24 in.? Of 16 ft.? Of 8¢?

3. Find 50% of $20. Of $.40. Of a dime. Of a gallon.

Of 72 ft.

4.

5.

Find 12% of 40¢. Of 8 yd. Of 4 bu.
What is 333% of a yard? Of 12 qt?

Of $300?

How much

6. A man who had $10 spent 50% of it.

had he left?

7. Mr. Lee has 40 acres of land. If he plants 25% of it in corn, how many acres does he plant?

8.

How many days in 333% of the month of June?

9. If $6 is 50% of my cash, how much have I?

10.

6 is of what number? 6 is 20% of what number? 11. A farmer had 80 chickens, but a hawk caught 25% of them. How many did the farmer have left?

12. What is the difference in hours between 163% and 121% of one day?

13. Eva's age is 75% of the age of Ethel, who is 16 years old. How old is Eva?

14. Pencils bought at 48¢ a dozen were sold at a gain of 25%. Find the selling price of each pencil.

15. A girl spelled correctly 99% of 200 words. How many did she miss?

16. Some boys bought a pie, and each ate 25% of it. If the whole pie was consumed, how many boys were there?

17. What is the distance between two towns if 5 miles is 33% of the distance?

18. I had $20, but spent $10 of it for a dress. What per cent of my money did I spend?

19. A farmer who had 8 cows sold 2 of them. What per cent of them did he sell?

20. I bought a stove for $12 and sold it so as to gain $3. What per cent of the cost did I gain?

Gain or loss is always some per cent of the cost.

« ΠροηγούμενηΣυνέχεια »