intro to fractions

1. What Are Fractions?

2. Integer
• An integer is a POSITIVE or NEGATIVE whole number
• Examples:
1, 5, 8, 25, 90, -3, -56, -234
• Non-Examples:
.5, ½, 100.25, -3/4

3. What is a Fraction?
• A fraction is a part of a whole
– like a piece of a whole pizza or a whole pie
• A fraction is also a part of a set
– like in a dozen cupcakes

4. Equal Parts
• To have a fraction, you must have
equal parts
not equal parts
equal parts

5. What does a fraction look like?
1
4 denominator
numerator

6. Numerator and Denominator
Numerator – The number on top that tells how
many equal parts are described in the fraction.
Denominator – The quantity below the line in a
fraction. It tells the number of equal parts into
which the whole is divided.

7. How Do We Read Fractions?
• one half
2
1
3
1
4
1
6
1
8
1
10
1
• one third
• one fourth
• one sixth
• one eighth
• one tenth

8. the number of peanut butter cookies
the total number of cookies
1
Parts of a Set
• Example - We made 6 cookies. 1 is
peanut butter and 5 are chocolate
chip. How would you write the
number of peanut butter cookies as a
fraction.
6

9. Parts of a Set
• What fraction of the triangles are red?
red triangles
total number triangles
1
2

10. Parts of a Set
• What fraction of the boxes are
orange?
orange boxes
total number boxes
1
4

11. Parts of a Set
• What fraction of the stars are yellow?
yellow stars
total number stars
4
10

12. Parts of a Whole
• Example – I ordered one whole pizza.
It was cut into 8 slices. I ate 2 slices.
What fraction of the whole pizza did I
eat?
the number of slices I ate
the total number of pizza slices
2
8

13. Parts of a Whole
• What is the fraction of the colored part
of each picture below?
2
1
3
1
4
1
8
1
6
1

14. Parts of a Whole
• What is the fraction of the blue part of
the picture below?
1
4
2
3
4

15. Parts of a Whole
• What is the fraction of the colored part
of each picture below?
3
2
6
4
4
3
2
2
8
7

16. Proper Fraction
• A Proper Fraction has a top number (numerator) less than its bottom
number (denominator)
• Example:
3
2
8
7

17. Improper Fraction
Fraction in which the numerator is bigger than the denominator. You must DIVIDE to
make it into a mixed number.
EX: 25
4

18. Mixed Number
Number that contains a whole number and a fraction.
Ex: 3 ½

19. Greatest Common Facter
•Also known as GCF
•The largest number that divides evenly into two or more numbers.
•Used when simplifying fractions

20. Least Common Multiple
• The least common multiple of the denominators of two or more fractions.
• Ex: 4/8 and 5/6
• Multiples of 8: 8, 16, 24, 32, 40, 48, 56
• Multiples of 6: 6, 12, 18, 24, 30, 36, 42, 48

21. • PowerPoint a combination of:
– http://www.teacherspayteachers.com/Product/Intro-to-Fractions-PowerPo
int-Lesson-506079
And
- Mrs. Draper