Measurement
Inch, 1/2”, and ¼”
By:
Karla Mills
3rd Grade
Tennessee
Standard 4 – Geometry and Measurement
0306.4.11 Know common equivalences for length (1
meter = 100 centimeters, 1 yard = 3 feet, 1 foot = 12
inches).
• 0306.4.12 Make and record measurements that use
mixed units within the same system of measurement
(such as feet and inches, meters and centimeters).
• 0306.4.13 Use common abbreviations: km, m, cm, in, ft,
yd, mi.
Think of each inch as a rectangle
Each rectangle is a part of a
whole.
Think of each inch as a rectangle
Think of each inch as a rectangle
Think of each inch as a rectangle
Each rectangle builds to make a 12
inch ruler.
Numbers are added to look like a
ruler.
0
1
2
3
4
5
6
7
8
9
10
11
12
Numbers are added to look like a
ruler.
0
1
2
3
4
5
6
7
8
9
10
11
12 inches is equal to 1 foot
The abbreviation for inch is “. The
abbreviation for foot is ft.
12
Three feet equal 1 yard
If 1 foot is equal to 12 inches,
And 1 yard is equal to 3 feet.
How many inches are in one
yard?
The abbreviation for yard is yd.
Yes! You got it!
The answer is 36 inches
Each rectangle can be divided in
half (1/2)
On your ruler, it will be slightly
shorter.
When the ½ inch line is added to
our ruler, it looks like this
0
1
2
3
4
5
6
7
8
9
10
11
12
• I have made the ½ inch line red; it
makes it easier to see.
• Highlight the ½ inch line on your
ruler with a red crayon.
Each rectangle is divided into equal
parts.
• For example : A rectangle can be divided
in to 4 equal parts.
When the 1/4 inch line is added to
our ruler, it looks like this
Did you notice the ½ inch line is
the same as the second ¼ inch
line. 2/4 is the same as ½. If
you eat 2/4 of a pie, you have
eaten ½ of the pie.
• Lets look at that again.
1/4
2/4
OR
1/2
3/4