Reading a Ruler

Objective:1.KNOW HOW TO USE A RULER PROPERLY.2.UNDERSTAND how to find halves (1/2), quarters (1/4) and eighths 1/8 measurements

TODAY’s AGENDA:•COMPELTE THE PRETEST IN 5 MINUTES•GO OVER PRETEST ANSWERS•REVIEW HOW TO USE RULER

BOTH RULERS ARE CORRECT TOOLS FOR MEASURING! IT IS

YOUR REPSONSIBILITY YOUR REPSONSIBILITY TO ALWAYS START MEASURING AT THE ZERO!

Notice where the "0" line falls on the ruler. Some rulers have this line at the exact edge of the ruler and other rulers place this line slightly to the right of the edge.

The location of the "0" line is important for accurate measuring because you must place this point on the ruler at the exact edge of the item or space you're

measuring.

#1 reason kids get measuring WRONG…not noticing where the 0 is located!

Reading a RulerPretest

1 2 3 4 5

1 2 3 4 5

Reading a RulerPretest Answers

1 2 3 4 5

1 2 3 4 5

8328

12

1

18

518

134

334

1452

41

85

431

2128

118

724

138

538

348

74

Reading a Ruler

Fraction Review

A circle can be divided into many parts. For purposes of this review, the circle will be divided in to halves, quarters, and eights.

Reading a Rule

Fraction Review

Here the circle is divided into halves (two parts). If you add the two halves, what do you get for an answer?

1/2

1/2

Reading a Ruler

Fraction Review

Here the circle is divided into quarters (four parts). If you add the four quarters, what do you get for an answer?

1/4 1/4

1/4 1/4

Fraction Review

Here the circle is divided into eight parts. If you add the eight parts, what do you get for an answer?

1/8 1/8

1/8

1/8

1/81/8

1/8

1/8

Reading a Ruler

Reading a Ruler

Fraction Review

An inch can also be divided into many parts. For purposes of this review, the inch will be divided in to halves, quarters, and eights.

1”

1

Reading a Ruler

Fraction Review

Here the inch is divided into halves (two parts). If you add the two halves, what do you get for an answer?

1”

Halves

21

21

Reading a Ruler

Fraction Review

Here the inch is divided into four parts. If you add the four parts, what do you get for an answer?

1”

Quarters

41

41

41

41

Reading a Ruler

Fraction Review

Here the inch is divided into eight parts. If you add the eight parts, what do you get for an answer?

1”

Eights

81

81

81

81

81

81

81

81

Reading a Ruler

What do you think the missing measurement is?

1 2

1/2” 1” 1 1/2”

Reading a Ruler

What do you think the missing measurement is?

1 2

1/2” 1” 1 1/2” 2”

Reading a Ruler

What are the missing measurements?

1 2

1/2” 1”

1 1/4”3/4”1/4”

Reading a Ruler

What are the missing measurements?

1 2

1/2” 1”

1 1/4”3/4”1/4”

1”

Reading a Ruler

What are the missing measurements?

1 2

1/2” 1”

1 1/4”3/4”1/4”

1” 1 1/2”

Reading a Ruler

What are the missing measurements?

1 2

1/2” 1”

1 1/4”3/4”1/4”

1”

1 3/4”

1 1/2”

Reading a Ruler

What are the missing measurements?

1 2

1/2” 1”

1 1/4”3/4”1/4”

1”

1 3/4”

1 1/2” 2”

Reading a Ruler

What are the missing measurements?

1 2

1/8” 3/8” 5/8” 7/8” 1 1/8” 1 3/8”

1/4” 1/2” 3/4” 1” 1 1/4”

1 5/8”

2 1/2”

Reading a Ruler

What are the missing measurements?

1 2

1/8” 3/8” 5/8” 7/8” 1 1/8” 1 3/8”

1/4” 1/2” 3/4” 1” 1 1/4”

1 5/8”

2 1/2”1 1/2”

Reading a Ruler

What are the missing measurements?

1 2

1/8” 3/8” 5/8” 7/8” 1 1/8” 1 3/8”

1/4” 1/2” 3/4” 1” 1 1/4”

1 5/8”

2 1/2”1 1/2” 1 3/4”

Reading a Ruler

What are the missing measurements?

1 2

1/8” 3/8” 5/8” 7/8” 1 1/8” 1 3/8”

1/4” 1/2” 3/4” 1” 1 1/4”

1 5/8”

2 1/2”1 1/2” 1 3/4”

1 7/8”

Reading a Ruler

What are the missing measurements?

1 2

1/8” 3/8” 5/8” 7/8” 1 1/8” 1 3/8”

1/4” 1/2” 3/4” 1” 1 1/4”

1 5/8”

2 1/2”1 1/2” 1 3/4” 2”

1 7/8”

Reading a Ruler

What are the missing measurements?

1 2

1/8” 3/8” 5/8” 7/8” 1 1/8” 1 3/8”

1/4” 1/2” 3/4” 1” 1 1/4”

1 5/8”

2 1/2”1 1/2” 1 3/4”

2 1/8”

2”

1 7/8”

Reading a Ruler

What are the missing measurements?

1 2

1/8” 3/8” 5/8” 7/8” 1 1/8” 1 3/8”

1/4” 1/2” 3/4” 1” 1 1/4”

1 5/8”

2 1/2”1 1/2” 1 3/4” 2 1/4”

2 1/8”

2”

1 7/8”

Reading a Ruler

What are the missing measurements?

1 2

1/8” 3/8” 5/8” 7/8” 1 1/8” 1 3/8”

1/4” 1/2” 3/4” 1” 1 1/4”

1 5/8”

2 1/2”1 1/2” 1 3/4”

2 3/8”

2 1/4”

2 1/8”

2”

1 7/8”

Reading a Ruler

What are the missing measurements?

1 2

1/8” 3/8” 5/8” 7/8” 1 1/8” 1 3/8”

1/4” 1/2” 3/4” 1” 1 1/4”

1 5/8”

2 1/2”1 1/2” 1 3/4”

2 5/8”2 3/8”

2 1/4”

2 1/8”

2”

1 7/8”

Reading a RulerPost Test

1 2 3 4 5

1 2 3 4 5

Name:Period:

Reading a RulerPost Test Answers

1 2 3 4 5

1 2 3 4 5

8328

12

1

18

518

134

334

1452

41

85

431

2128

118

724

138

538

348

74

Reading a Rule

An inch is often divided into sixteen parts. Count the spaces in the inch on the right side of the slide. How many are there?

1”

Eights

81

81

81

81

81

81

81

81

1”

Sixteenths

16

2

All the red fractions can be reduced. Do you see any patterns?

0 1

2

1

4

1 4

3

8

1

8

3

8

5

8

7

16

1

16

3

16

5

16

7

16

9

16

11

16

13

16

15

16

4

16

6

16

8

16

10

16

12

16

14