17. Divide 51.5 by 412, and 412 by 51.5.

18. Multiply 31.5 by 27.9, and divide the product by 9.765.

CHAPTER IX.

DENOMINATE NUMBERS. SURFACES AND VOLUMES.

PERCENTAGE. INTEREST.

REDUCTION OF DENOMINATE NUMBERS.

766. Reduce 5 gal. 3 qt. 1 pt. to pints.

In 5 gal. there are 20 qt. Adding the 3 qt., we have 23 qt. Multiplying by 2 to reduce to pints, and adding in 1 pt., we get the answer, 47 pints.

767. Reduction Descending. Slate Exercises. Reduce to pints:

1. 16 gal. 1 qt. 1 pt.

6. 311 gal.

768. Change 67 pt. to gallons, quarts, and pints.

770. Reduction Descending.

21. Change 17 yd. 1 ft. 9 in. to inches.

22. 4 mi. 100 rd. 4 yd. to yards.

23. 74 bu. 2 pk. 7 qt. to quarts.

24. 156 lb. 11 oz. to ounces.

25. 63 yd. 0 ft. 3 in. to inches.
26. 19 bu. O pk. 3 qt. to quarts.

27. 11 rd. 31 yd. to feet.
28. 63 gal. 3 qt. to pints.

29. 3 bu. 6 qt. to quarts.
30. 17 T. 369 lb. to pounds.

31. 15 hr. 16 min. to seconds.

3. How many minutes in of an hour?

4. How many hours and minutes in of a day?
5. How many quarts and pints in 3 of a gallon?
6. How many hours and minutes in .2 day?
7. How many quarts and pints in .375 gallon?
8. Change .3 day to hours and minutes.

9. Change .625 bu. to pk. and qt.

10. What part of a gallon is 1 pt.?

11. What part of a gallon is 3 pt. ?
12. What part of a gallon is 1 qt. 1 pt.?
13. What decimal of a gallon is 1 qt. 1 pt.?
14. What decimal of a gallon is 2 qt. 1 pt.?
15. What part of 2 gallons is 2 qt. 1 pt.?
16. Change .375 bu. to pt. and qt.

17. What decimal of a bu. is 4 qt.?

18. What fraction of a day is 3 hr. 20 min.?

19. Reduce 960 min. to hours.

20. How many minutes in a day?

773. Slate Exercises.

1. What decimal of a ton is 3 lb.?

2. What fraction of a day is 12 min. 30 sec.?

3. Reduce of a day to minutes.

4. Reduce .03125 day to minutes.

5. What decimal of a day is 9 minutes?

6. What will be the cost of 15 T. and 750 lb. coal at $5 per ton?

7. If coal is $5 per ton, how much can be bought for $18.76? 8. If 7 T. 296 lb. coal cost $35.74, how much will I have to pay for 18,748 lb.?

9. A man pays $48.92 for 9 T. 1,568 lb. coal. How many tons, etc., would he receive for $73.11?

10. Change 2 ft. 7 in. to the fraction of a yd.

11. Reduce 3 pk. 4 qt. 1 pt. to the decimal of a bu.

12. How many pk., qt., etc., in .9375 bu.?

13. If .1875 of a gal. of cologne cost $1.125, what will 1 pt. cost?

14. Find the cost of 42 gal. 3 qt. 1 pt. oil, at 16¢ per gal. 15. Reduce of a gal. to qt. and pt.

16. What part of 3 T. is 1 T. 960 lb. ?

17. A man raised 139 bu. 2 pk. and 2 qt. of rye. He sold 119 bu. 2 pk. 4 qt. What fraction of his crop did he sell?

18. 10 bu. 1 pk. of seed is packed in 8 bags. How much is there in each bag?

19. What decimal of a day is 21 hr. 14 min. 24 sec.?

20. How many feet in a mile?

COMPOUND ADDITION.

774. Add the following:

1. 17 lb. 3 oz.

4 lb. 9 oz.

23 lb. 12 oz.

15 oz.

2. 18 bu. 3 pk. 7 qt.
9 bu. 2 pk. 4 qt.

14 bu. 1 pk. 6 qt.
2 pk.