6. Add as common fractions each of the following pairs

Find also the difference between each pair of fractions. 7. In the following table: (a) Compute the average price, in cents, of a bushel of corn in each state for the years 1914, 1915, and 1916. (Divide the sum of the three prices in each line by 3; work out each quotient to tenths; then write the answer to the nearest cent. Thus 72.8 cents would be 73 cents; 72.4 cents would be 72 cents.) (b) In a similar way compute the average yield in bushels per acre, correct to tenths, for the years 1914, 1915, and 1916. (As these numbers are given correct to tenths, work out each quotient to hundredths, and then write the answer to the nearest tenth. Thus 18.47 bu. would be 18.5 bų.; 18.43 bu. would be 18.4 bu.)

UNITED STATES CROP REPORT, DECEMBER, 1916

8. In the following table:

(a) Find the sum of each column.

(b) Find the average number of acres planted. (c) Find the average yield per acre.

(d) Find the average price per bushel.

The numbers and prices for problems 9-18 inclusive,

that follow, will be found in the above table.

K

9. If the average yield of an acre in Maine was 204 bushels of potatoes and the price per bushel, Dec. 1, 1916, was $1.42, find the value of an acre of potatoes in the state of Maine.

10. Find the value of an acre of potatoes in New Hampshire. (Consult table.)

11. Find the value of an acre of potatoes in Vermont. 12. Find the value of an acre of potatoes in Massachusetts.

13. Find the value of an acre of potatoes in Rhode Island.

14. Find the value of an acre of potatoes in New Jersey.

15. What was the excess in value of an acre of potatoes in Maine over that of an acre in New Hampshire? (Compare answers of Exs. 9 and 10.)

16. What is the excess in value of an acre of potatoes in New Hampshire over that of an acre in Vermont? In New York over that in Pennsylvania?

17. Find the number of bushels of potatoes produced in Rhode Island in 1916. In Connecticut. In Delaware.

18. Find the value of the crop of potatoes in Rhode Island in 1916. In Delaware.

19. In 1915 New York produced 22,010,000 bushels of potatoes. The average yield per acre was 62 bushels. How many acres were planted?

20. In 1915 Maine produced 25,418,000 bushels of potatoes. The average yield per acre was 179 bushels. How many acres were planted?

21. In the following table find the total of each column

and the average.

MONTHLY PRICES OF WHEAT

The following table gives in the United States the estimated average price, cents per bushel, to producers of wheat, monthly

22. Find the cost of 825 bushels of wheat at the price of Jan. 1, 1916.

23. Find the cost of 825 bushels of wheat at the price of Dec. 1, 1916.

24. Find the excess of the cost in Ex. 23 over that in Ex. 22.

25. A farmer had 384 bushels of wheat to sell. He sold of it at $1.36 per bushel, the remainder at $1.58. What was the total amount received for his crop of wheat?

26. A farmer had 360 bushels of corn to sell. He sold 25% of it at 78 cents per bushel, 334% of what was left at 80 cents per bushel, the remainder at 75 cents per bushel. How much did he receive for his corn?

27. An automobile covers 242 miles in 12 hours. Taking out 14 hours, the time consumed in getting dinner and making repairs, what was the average number of miles actually driven per hour?

28. A tank has a capacity of 7 cu. ft. How many gallons will it hold? (231 cu. in. = 1 gal.)

29. A car of 220 bushels of potatoes was loaded in Northern Maine. The potatoes cost $1.20 per bushel on the car. On the way to New York City 10 per cent of them were frost-bitten. If the potatoes that were saved were sold on the car in New York City for $1.50 a bushel, what was the net profit on this transaction?

30. 100 yards are what per cent of 440 yards? 31. 220 yards are what per cent of 100 yards? 32. A laborer gets d dollars per week. Express the amount he will receive for 3 weeks; 2 weeks;

week.

33. At the wage in Ex. 32 how will you express what the laborer gets per day? (Call a week 6 days.) For 2 days? For 3 days? Solve Exs. 34-38 by the equation method. (See Chapter II.)

34. A's salary in 1916 was $3762. This was of his salary in 1915. Find his salary for 1915.

35. The registration in school A was 564 pupils in 1916. This was of the registration in 1915. What was its registration in 1915?

36. When coal retails for $9.50 per ton (2000 lb.), how much should I pay for 2500 lb.? For 3500 lb. ? For 5000 lb. ?