fractions of an inch
DESCRIPTION
Fractions of an Inch. By Miss O. Measuring to the nearest fraction of an inch. What do all the tick marks represent?. What is between a 1 inch and a 2 inch on a ruler?. The tick marks represent fractions!. Fractions are between each inch on a ruler. - PowerPoint PPT PresentationTRANSCRIPT
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Fractions of an InchBy Miss O.
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Measuring to the nearest fraction of an inch.
• What is between a 1 inch and a 2 inch on a ruler?
What do all the tick marks represent?
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The tick marks represent fractions!
• Fractions are between each inch on a ruler.• Using fractions of an inch makes your
measuring more EXACT.
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“Benchmark” Fractions You Have to MEMORIZE!
0 1
34
58
14
18
38 1
2
78
How long is the length of the arrow to the nearest inch?
Benchmark means “standard.”
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Fractions of an Inch Song
(to the tune of “Here We Go Round the Mulberry Bush”)
Tap your tip on a half of an inch,Half of an inch, half of an inch.Tap your tip on a half of an inch;There’s 2 in every inch!
0 1 =12
22
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Fractions of an Inch Song Verse 2
Tap your tip on a quarter of an inch,Quarter of an inch, quarter of an inch.Tap your tip on a quarter of an inch;There’s 4 in every inch!
0 1 =14
442
434
1 = 22 4
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Fractions of an Inch Song Verse 3
Tap your tip on a eighth of an inch,Eighth of an inch, eighth of an inch.Tap your tip on a eighth of an inch;There’s 8 in every inch!
0 1 =28
884
868
1 = 42 8
78
58
38
18
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A Poem to Help Us Memorize
0 1
34
58
14
18
38 1
2
78
Start with one eighth, then one fourth, Next three-eighths, and half of course!After that comes five-eighths,Three-fourths, seven-eighths—wow, we’re great!
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Finding Fractions of An Inch Worksheet
• Trace each inch mark in yellow.• Trace each half-inch (1/2) mark in orange.• Trace each quarter-inch (1/4) mark in red.• Trace each eighth-inch (1/8) mark in blue.• Trace each sixteenth-inch (1/16) mark in
green.
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What if the marks are NOT labeled?
• Like on MOST rulers…
• That’s why you have them MEMORIZED…– So…you can write them in yourself and still be able to
measure to a fraction of an inch!
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Let’s practice!
0 1
How long is the length of the arrow to the nearest fraction of an inch?
inches
Share your answer with a partner!
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Let’s keep practicing!
0 1
How long is the length of the arrow to the nearest fraction of an inch?
inches
Write your answer in your math notebook.
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And some more!
0 1
How long is the length of the arrow to the nearest fraction of an inch?
inches
Write your answer in your math notebook.
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Read the directions carefully!
0 1If the directions say “measure to the nearest inch,” you have 1 option the whole number inch!
inches
Nearest InchWhole number
inches only!
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Read the directions carefully!
0 1If the directions say “measure to the nearest half inch,” you have 2 options the whole number inch or the ½ inch between!
inches
1/2
Nearest Half InchWhole number inch
½ inch
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0 1
If the directions say “measure to the nearest quarter inch,” you have 4 options the whole number inch, the ½ inch, or the quarter inches (1/4 and ¾)!
inches
1/21/4 3/4
Quarter of an InchWhole number inch
½ inch¼ or ¾ inch
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0 1
If the directions say “measure to the nearest eighth of an inch,” you have 8 options the whole number inch, the ½ inch, the quarter inches (1/4 and ¾), or the eighth inches (1/8, 3/8, 5/8, and 7/8)!
inches
1/21/4 3/41/8 3/8 5/8 7/8
Nearest eighth of an Inch1 whole inch
½ inch¼ or ¾ inch
1/8, 3/8, 5/8, 7/8 inch
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Read the directions and then measure!
0 1
Measure to the nearest whole inch. inches
Write your answer in your math notebook.
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Read the directions and then measure!
0 1
Measure to the nearest half inch. inches
Write your answer in your math notebook.
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Read the directions and then measure!
0 1
Measure to the nearest quarter inch. inches
Write your answer in your math notebook.
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Read the directions and then measure!
0 1
Measure to the nearest eighth inch. inches
Write your answer in your math notebook.
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Read the directions and then measure!
2 3
Measure to the nearest eighth inch. inches
Write your answer in your math notebook.
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Read the directions and then measure!
2 3
Measure to the nearest half inch. inches
Write your answer in your math notebook.
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0 1
34
58
14
18
38 1
2
78
Estimating Fractional Parts
Estimating means “guesstimating.”
Using the “benchmark fractions” we have been learning with measuring the nearest inch, we can “guesstimate” fractional parts too!