Fancy specialty calculators may not be around on the job site, learn to convert in writing using a basic calculator.
To multiply 7`- 5 1/4" x 2` - 3 3/8", conversion to decimal feet is necessary.
By the end you will get why 7.1875 feet = 7`- 5 1/4"
Prerequisites: Must be proficient in reading a tape measure in inches and metric, + and - fractions, +, - and x decimals. Also learn to read an engineers` tape.
Steps:
1 Subtract feet, write feet into final answer.
2 Multiply left over decimal digits by 12.
3 Write whole number from result into final answer as inches.
4 Subtract whole number, multiply decimal left over digits by either 2, 4, 8, or 16 (or 32, 64, 128).
5 Write this multiplier number (2, 4, 8, ...) as the denominator in the fractions of an inch. 6 Round result up to nearest whole number (typically by 0.11111 ...) This new whole number is the numerator in the fractions of an inch. Only minimal rounding is needed.
3 сен 2012
