Fractions of an Inch

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Fractions of an Inch By Miss O.

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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 Presentation

Transcript of Fractions of an Inch

Page 1: Fractions of an Inch

Fractions of an InchBy Miss O.

Page 2: Fractions of an Inch

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?

Page 3: Fractions of an Inch

The tick marks represent fractions!

• Fractions are between each inch on a ruler.• Using fractions of an inch makes your

measuring more EXACT.

Page 4: Fractions of an Inch

“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.”

Page 5: Fractions of an Inch

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

Page 6: Fractions of an Inch

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

Page 7: Fractions of an Inch

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

Page 8: Fractions of an Inch

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!

Page 9: Fractions of an Inch

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.

Page 10: Fractions of an Inch

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!

Page 11: Fractions of an Inch

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!

Page 12: Fractions of an Inch

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.

Page 13: Fractions of an Inch

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.

Page 14: Fractions of an Inch

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!

Page 15: Fractions of an Inch

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

Page 16: Fractions of an Inch

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

Page 17: Fractions of an Inch

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

Page 18: Fractions of an Inch

Read the directions and then measure!

0 1

Measure to the nearest whole inch. inches

Write your answer in your math notebook.

Page 19: Fractions of an Inch

Read the directions and then measure!

0 1

Measure to the nearest half inch. inches

Write your answer in your math notebook.

Page 20: Fractions of an Inch

Read the directions and then measure!

0 1

Measure to the nearest quarter inch. inches

Write your answer in your math notebook.

Page 21: Fractions of an Inch

Read the directions and then measure!

0 1

Measure to the nearest eighth inch. inches

Write your answer in your math notebook.

Page 22: Fractions of an Inch

Read the directions and then measure!

2 3

Measure to the nearest eighth inch. inches

Write your answer in your math notebook.

Page 23: Fractions of an Inch

Read the directions and then measure!

2 3

Measure to the nearest half inch. inches

Write your answer in your math notebook.

Page 24: Fractions of an Inch

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!