what are fractions?. what is a fraction? a fraction is a part of a whole –l–like a piece of a...

What Are Fractions?What Are Fractions?

What is a Fraction?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

Equal PartsEqual Parts

• To have a fraction, you must have equal parts

not equal parts

equal parts

What does a fraction look like?

What does a fraction look like?

1

4 denominator

numerator

How Do We Read Fractions?

How Do We Read Fractions?

• one half21

31

41

61

81

101

• one third

• one fourth

• one sixth

• one eighth

• one tenth

the number of peanut butter cookies

the total number of cookies

1

Parts of a SetParts 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

Parts of a SetParts of a Set

• What fraction of the triangles are red?

red triangles

total number triangles

1

2

Parts of a SetParts of a Set

• What fraction of the boxes are orange?

orange boxes

total number boxes

1

4

Parts of a SetParts of a Set

• What fraction of the stars are yellow?

yellow stars

total number stars

4

10

Parts of a WholeParts 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

Parts of a WholeParts of a Whole

• What is the fraction of the colored part of each picture below?

21

31

41

81

61

Parts of a WholeParts of a Whole

• What is the fraction of the blue part of the picture below?

4

Parts of a WholeParts of a Whole

• What is the fraction of the colored part of each picture below?

32

64

43

22

87