# Reading a Ruler Objective: KNOW HOW TO USE A RULER PROPERLY.

## Presentation on theme: "Reading a Ruler Objective: KNOW HOW TO USE A RULER PROPERLY."— Presentation transcript:

Reading a Ruler Objective: KNOW HOW TO USE A RULER PROPERLY.
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

#1 reason kids get measuring WRONG…not noticing where the 0 is located!
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. BOTH RULERS ARE CORRECT TOOLS FOR MEASURING! IT IS YOUR REPSONSIBILITY TO ALWAYS START MEASURING AT THE ZERO!

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

1/2 1/2 Here the circle is divided into halves (two parts). If you add the two halves, what do you get for an answer?

1/4 1/4 1/4 1/4 Here the circle is divided into quarters (four parts). If you add the four quarters, what do you get for an answer?

1/8 Here the circle is divided into eight parts. If you add the eight parts, what do you get for an answer?

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.

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

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

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

Reading a Ruler What do you think the missing measurement is?

Reading a Ruler What do you think the missing measurement is? 2”

Reading a Ruler What are the missing measurements?

Reading a Ruler What are the missing measurements? 1”

Reading a Ruler What are the missing measurements? 1” 1 1/2”

Reading a Ruler What are the missing measurements? 1 3/4” 1” 1 1/2”

Reading a Ruler What are the missing measurements? 1 3/4” 1” 1 1/2” 2”

Reading a Ruler What are the missing measurements?

Reading a Ruler What are the missing measurements? 1 1/2”

Reading a Ruler What are the missing measurements? 1 1/2” 1 3/4”

Reading a Ruler What are the missing measurements? 1 7/8” 1 1/2”
1 3/4”

Reading a Ruler What are the missing measurements? 1 7/8” 1 1/2”
1 3/4” 2”

Reading a Ruler What are the missing measurements? 1 7/8” 2 1/8”
1 1/2” 1 3/4” 2”

Reading a Ruler What are the missing measurements? 1 7/8” 2 1/8”
1 1/2” 1 3/4” 2” 2 1/4”

Reading a Ruler What are the missing measurements? 1 7/8” 2 1/8”
2 3/8” 1 1/2” 1 3/4” 2” 2 1/4”

Reading a Ruler What are the missing measurements? 1 7/8” 2 1/8”
2 3/8” 2 5/8” 1 1/2” 1 3/4” 2” 2 1/4”

Name: Period: Reading a Ruler Post Test