Example: Reduce 10 yards 8 feet 10 inches to inches.
Work:
| Yards | Feet | Inches |
|---|---|---|
| 10 | 8 | 10 |
| 3 | ||
| 38 | ||
| 12 | ||
| 456 | ||
| 10 | ||
| 466 | ||
Solution:
10 yards = 10 × 3 feet = 30 feet. 30 feet and 8 feet are 38 feet.
38 feet = 38 × 12 inches, or 456 inches. 456 inches + 10 inches = 466 inches.
Note.—To prove the above work, use reduction ascending, beginning with the result.
Long or Linear Measure
Long or linear measure is used in measuring lines and distances.
There are two systems in use in the United States, the English System and the French System. The English system is the one commonly used, while the French system is used in making scientific measurements. (See under Metric System.)