MEASUREMENTS Fractionaldecimal equivalents There are several uses for

MEASUREMENTS

Fractional/decimal equivalents �There are several uses for equivalents for fractions in our shop. �We need to know that ½ is. 500 �To use taps and dies �To use construction tools �To use in metals projects during construction

Decimal Values � � . 500. 5= tenths. 50= first 0 represents hundredths. 500= second zero represents thousanths

Fractions �The fractions we will deal with are as follows: � 1/8, ¼, 3/8, ½, 5/8, ¾, 7/8, 1 =. 125 3/8= � 1/8=. 375

ONE FOURTH �¼= . 250

One half �½= Five eighths. 500

Five Eighths 5/8=. 625

Three Fourths �¾= . 750

Seven Eights � 7/8= . 825

Whole Pie � 1/1= 1 any number over itself is equal to 1 �

Division � The decimal equivalent is found in 1/8 by dividing 8 into 1 or divide 8 by one either way is correct. Your answer is ? �Now take calculator and divide 1 by 8. �What is your answer? Call on student. �Now how would we find the equivalent of ¼ �Now let’s try doing the hand out and finish answers to the third place from decimal point. �Hand out sheet

One eighth 1/8= . 125

Trade of Thought � 1/8=. 125 �If you add two 1/8 you get. 125 +. 125 =. 250 = 1/4 �How do I know this is correct. �Divide 1 by 4 on your calculator=. 250 �Because if you add two eighths which is. 125 +. 125 =. 250 or 1/4 �If you add two ¼ together you get. 250 +. 250 =. 500 or 1/2

One Half ½= . 500

Conclusion of Handout �How do we find fraction equivalents? �Divide the top number by the bottom number with a calculator if you need to complete answer. �Now let’s use this in construction. �The dowel is half of the thickness of the piece of wood used. �We need to put a dowel joint on a table and legs. �How do we determine the size of the dowel.

Dowel Joint �The piece being used is ¾” thick the dowel needs to be half of this dimension. �We need to use a. 375 dowel or 3/8”. �Give dowel joint demonstration. �Show what dowel jig looks like and how it is centered. �Show dowel center. �Drill both holes according to width of boards.

Three eighths 3/8= . 375

Dowel joint demo �Show to figure dowel width. �Show holes in matching pieces of wood �Show dowel center �Show drilling of matching hole �Show dowel pin �Show completed joint

How Do We Convert Fractions to Decimals �We divide The Bottom Number into the top number. �Or we divide the denominator into the numerator. � 1 Numerator �_ � 8 Denominator �Take calculator and divide eight into one =. 125 1/8=. 125