was appointed to purchase the necessary supplies. The class contributed $4.50 for the purpose. Ethel said that she would buy 50 pounds of sugar, 10 cakes of chocolate, 15 cans of condensed milk, and 2 pounds of butter. Sugar cost 7 cents a pound, chocolate 20 cents a cake, milk 15 cents a can, and butter 55 cents a pound. Jack Wood laughed at her when she told him about it, and asked her what she was going to do with the rest of the money. Why do you think he laughed?

2. Max one day bought at the school lunch room a ham sandwich for 7 cents, a bottle of milk for 5 cents, a roll for 2 cents, a pat of butter for 1 cent, and a piece of pie for 7 cents. Arthur was cashier. Max gave him 50 cents and Arthur handed back 22 cents. Max said he was sure that the lunch cost less than a quarter, and he ought to have more than a quarter left. Was he right?

In each of the following, first estimate, then work, then check.

3. 5 tons of coal at $12 a ton.

4. 465 barrels of flour at $3.50 a barrel.

5. 2 pounds of meat at 40¢ a pound will cost

6. 12 days of work at $4.80 a day amounts to

7. 8 pounds of sugar at 6¢ a pound is

8. What is the weight of 31 cubic feet of water if 1 cubic foot weighs 62 pounds?

A Review Check on Estimates

I. R. B. Test [1]. First Trial Scores. Prepare a chart for Chapter III (3 tests) similar to the ones you drew in your I. R. B. for Chapters I and II. In each test let the Steering Committee and teacher fix a time for the class. First estimate, then solve accurately, each of the following 16 examples. Record the time and accuracy scores of your estimates as you did in Test [4] of Chapter II. Remember that any estimate which is counted in your accuracy score should be an accurate answer. Your score will probably be unsatisfactory but you can improve it in your next trials.

Addition.

1. 36 +30 + 25 + 36 + 10.

2. 260 +350 + 110 + 290.

3. $16.80 + $5.20 + $11.75 + $62.15.

4. 3 yds. +5 yds. + 8 yds. + 2 yds. + 6 yds.

8. John bought a pair of shoes for $7.50, a tie for $1.50,

a muffler for $2.50, and six collars at 30 cents each. much change should he receive from a $20 bill?

How

Multiplication.

9. Find the cost of 20 grapefruit at "two for a quarter."

REVIEW TRIAL OF I. R. B. TESTS, CHAPTER II

Try again the four I. R. B. Tests of Chapter II. On the chart where you entered the First and End-of-Chapter scores record your Review Trial scores in the proper column. Read again the directions given in the Review Trial of Chapter I, page 40.

Miscellaneous Review

1. See if you can state the results correctly in 20 seconds or less in the following additions:

2. See if you can do the following subtractions in less

3. Add the following (see Team Game on next page):

A TEAM GAME

Form two or more teams of the same number each. Let your teacher dictate the parts of the preceding example 3 in order. You add each two numbers; then add that total to the same two numbers above it; then add that total to all numbers above it, and so on until you get the tenth total, which will be the answer. See how many can get each tenth result right. Each right counts 10. Each wrong counts 0. Then total up the scores of the members of each team. Every team should work (a) until it is completed or until the teacher says stop; then (b), etc.

4. I. R. B. Test [2]. First Trial Scores.

Subtract across. Then add all three columns. Check

Multiply across and then add upward in the last column.

5. I. R. B. Test [3]. First Trial Scores.

Divide across and add the last column. See if you can check.

Add across from left to right. See if you can find a way to check.

6. If the average receipts of a bus are $8.75 per trip, what are the receipts for 56 trips?

7. How much change should be given for a $5 bill when each of the following purchases is made?

8. A clerk sold 1 pound of coffee at 54¢, 5 pounds of sugar for 27¢, and 2 pounds of butter at 56¢. How much change should the purchaser receive from a $10 bill?

9. The sum of two numbers is 5984. One of the numbers is 4325. What is the other number?

10. 28 is how many times 4? How did you work this example?

11. In Mr. Rhodes' store a pound of coffee costs 48 cents and a pound of tea 60 cents. What is the ratio of the cost of a pound of coffee to that of a pound of tea? Make a graph that will show this ratio.

12. The ratio of the cost of a pound of sugar to a pound of coffee is, and the ratio of the cost of a pound of cheese to a pound of coffee is. What is the price of sugar per pound when coffee costs 48 cents a pound? of cheese? Represent the above relations graphically.

13. The price of a pound of tea will buy 6 pounds of new potatoes, 4 pounds of white beans, or 3 pounds of soda crackers. State the ratio of each of these costs to the cost of a pound of tea. Show these relations by a graph.