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Read a tape measure
Measuring tools
• Tape measure
• Ruler
• Yard stick
• Folding ruler
• Measuring wheel
• Scale ruler
QUESTIONS
• Who wants to maximize their proficiency?
• Which tool do you think is a primary measuring tool in the Automotive field?
• Today you are going to learn how to use a ruler to make proper measurements in whole and fractional units.
FRACTIONS OF AN INCH
http://www.rickyspears.com/rulergame/
HALF INCH INCREMENTS
FRACTIONS OF AN INCH
One-quarter inch measures
FRACTIONS OF AN INCH
One-eighth of an inch
FRACTIONS OF AN INCH
Two-sixteenths of an inch
or
One-eighth of an inch
FRACTIONS OF AN INCH
Three-sixteenths of an inch
FRACTIONS OF AN INCH
Four-sixteenths of an inch
or
Two-eighths of an inch
or
One-fourth of an inch
FRACTIONS OF AN INCH
Five-sixteenths of an inch
FRACTIONS OF AN INCH
Six-sixteenths of an inch
or
Three –eights of an inch
FRACTIONS OF AN INCH
Seven-sixteenths of an inch
FRACTIONS OF AN INCH
Eight-sixteenths of an inch or
Four-eighths of an inch or
Two-fourths of an inch or
One-half of an inch
FRACTIONS OF AN INCH
Nine-sixteenths of an inch
FRACTIONS OF AN INCH
Ten-sixteenths of an inch
or
Five-eighths of an inch
FRACTIONS OF AN INCH
Eleventh-sixteenths of an inch
FRACTIONS OF AN INCH
Twelve-sixteenths of an inch or
Six-eighths of an inch or
Three-fourths of an inch
FRACTIONS OF AN INCH
Thirteen-sixteenths of an inch
FRACTIONS OF AN INCH
Fourteen-sixteenths of an inch
or
Seven-eighths of an inch
FRACTIONS OF AN INCH
Fifteen-sixteenths of an inch
FRACTIONS OF AN INCH
Sixteen-sixteenths of an inch
or
One inch
ADDING MEASURES
2
1
2
1
2
21
4
1
2
1 4
1
4
2
4
3
FRACTION RULES
RULES
1. To add fractions you must have a
common denominator
2. Reduce fractions
2
1
4
2
COMMON DENOMINATOR
How do you get a common denominator?
8 can be the common denominator when the fractions are in fourths or eighths.
16 can be the common denominator for
all rulers marked in 16ths.
Use 32 as the common denominator when the ruler is marked in 32nds.
COMMON DENOMINATOR
Multiply top and bottom by the same value to change the denominator correctly.
16
6
2
2
8
3
16
12
4
4
4
3
ADDING MEASURES
1 3
8 4
16
12
16
2
1. Get the common denominator
2. Rewrite the fractions
ADDING MEASURES
1 3
8 4
16
12
16
2
16
14
1. Get the common denominator
2. Rewrite the fractions
3. Add the numerators
4. Carry the denominator forward
ADDING MEASURES
1 3
8 4
16
12
16
2
16
14 8
7
1. Get the common denominator
2. Rewrite the fractions
3. Add the numerators
4. Carry the denominator forward
5. Reduce the answer
ADDING MEASURESwith WHOLE NUMBERS
1 31 28 4 2 12
1 216 16
14316
738
1. Add the whole numbers (like always)
2. Get the common denominator
3. Rewrite the fractions
4. Add the numerators
5. Carry the denominator forward
6. Reduce the answer
ADDING MEASURES
1 1
2 8 10
168
58 2
16 16
1 1
2 8
8
1
8
4 5
8
ADDING MEASURES
1 1
2 16 8 1
16 16
9
16
REMEMBERCOMMON DENOMINATORADDING & SUBTRACTING
How do you get a common denominator?
8 can be the common denominator when the fractions are in fourths or eighths.
16 can be the common denominator for
all rulers marked in 16ths.
Use 32 as the common denominator when the ruler is marked in 32nds.
COMMON DENOMINATOR
Multiply top and bottom by the same value to change the denominator correctly.
16
6
2
2
8
3
16
12
4
4
4
3
SUBTRACTING MEASURES
3 1
4 8 12 2
16 16
1. Get the common denominator
2. Rewrite the fractions
SUBTRACTING MEASURES
3 1
4 8 12 2
16 16 10
16
1. Get the common denominator
2. Rewrite the fractions
3. Subtract the numerators
4. Carry the denominator forward
SUBTRACTING MEASURES
3 1
4 8 12 2
16 16 10
16 5
8
1. Get the common denominator
2. Rewrite the fractions
3. Subtract the numerators
4. Carry the denominator forward
5. Reduce the answer
SUBTRACTING MEASURESwith WHOLE NUMBERS
5 12 18 4 5 2
2 18 8
318
1. Subtract the whole numbers (like always)
2. Get the common denominator
3. Rewrite the fractions
4. Subtract the numerators
5. Carry the denominator forward
6. Reduce, if necessary
SUBTRACTING MEASURES
1 1
2 8 6
16 38
8 2
16 16
1 1
2 8
4 1
8 8
3
8
SUBTRACTING MEASURES
1 1
2 16 8 1
16 16
7
16
SUBTRACTING MEASURES
1 3
2 16
4
1
8
5
8
2
8
5
8 3
16 16
5
16
8
3
MULTIPLYING MEASURES
• One-half of 1 inch means
11
2
or of 1 inch
“of is another way to say times”
MULTIPLYING MEASURES
Two times one-half is
adding one-half two times.
2 X = 1 + =1
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