1. INTRODUCING FRACTIONS

2. 1 2 FRACTION WORDS The top number is called the NUMERATOR
The NUMERATOR is the number of units and the
DENOMINATOR is the number of parts
The top number is called the NUMERATOR
The bottom number is called the DENOMINATOR

3. Why Do We Have Fractions ?
Fractions are numbers that result from dividing a length (numerator) into parts (denominator) 0_________________1__________________2
Above we have 2 units (numerator) divided into 3 EQUAL parts (denominator). The length of one part is the answer. The fraction 2/3 is spoken as “two-thirds”

4. Saying Fractions
1/2 Numerator = 1, Denominator = 2, we say “one-half “ 2/3 Numerator = 2, Denominator = 3, we say “two-thirds” 3/4 Numerator = 3, Denominator = 4, we say “three-quarters” 4/5 Numerator = 4, Denominator = 5, we say “four-fifths”

5. Unit Fractions
When the Numerator of any fraction is 1 we use a special name – UNIT FRACTION The Denominator can be any number as long as the Numerator = 1. 1/2, 1/3, 1/4, 1/5, 1/6, 1/7, 1/8, 1/9, 1/10, 1/11, 1/12, 1/13, 1/14, 1/15, 1/16, 1/17, 1/18...and on and on forever ! are all Unit Fractions !

6. Quick Test Write down the following six words as fractions
“one-half” 2. “two-thirds” 3. ”three-quarters”
4. “ two-fifths” 5. “four-sixths” 6. “five-sevenths”
Write down the following six numbers as words
1/ / / / / /7
What kind of fraction are 1/4 and 1/45 ?

7. Summary
A fraction has a TOP number called the NUMERATOR and a BOTTOM number called the DENOMINATOR
The NUMERATOR is a length divided by the DENOMINATOR into EQUAL parts. We say “thirds”, “quarters”, “fifths”, “sixths” etc
When the Numerator = 1 we have a Unit Fraction.