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. 1 2 3 4 10 5 6 7 8 9 11 12

Numbers are added to look like a ruler. 1 2 3 4 5 6 7 8 9 10 11 12 12 inches is equal to 1 foot The abbreviation for inch is “. The abbreviation for foot is ft.

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 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 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.

2/4 1/4 3/4 OR 1/2