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!
Reading a Ruler Pretest
Reading a Ruler Pretest Answers
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 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?
Reading a Ruler Fraction Review 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 1/8 1/8 1/8 1/8 1/8 1/8 1/8 Reading a Ruler Fraction Review Here the circle is divided into eight parts. If you add the eight parts, what do you get for an answer?
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.
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?
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?
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?
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
Reading a Ruler Post Test Answers
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?
14 9 6 2 12 10 8 1 3 3 1 1 4 5 7 15 1 3 13 5 7 11 8 8 8 16 16 16 16 8 16 16 4 16 2 16 16 16 16 16 16 16 16 4 All the red fractions can be reduced. Do you see any patterns? 0 1
