Ashley DuBord

R-4

o All students in the picture are going to share the cake equally. How many pieces of cake should we cut?

o We’ll find the answer later

o Each piece of cake is called a Fraction of the cake.

How to Make a Fraction!

o First you take the square

o Then you divide it into equal parts

o Color one part Red

Making a Fraction

o Now take the Red part and make it into a fraction

o Red parts: 1o Total parts: 4o Fraction of Red parts

to total partso 1/4 = red parts/total

parts

1 red part 4 total parts

Making a Fraction

o Let’s explain this a bit more carefully

o If the cake is cut into eight pieces and three are not eaten. What’s the fraction of uneaten pieces?

o Ans: 3/8

Fraction

Specific Part Divided by Total number of Parts

Ex: Piece of Cake Not Eaten

Ex: Total Number of Pieces of Cake

Back to Sharing the Cake!

o How many slices do we need if there are seven children and we do not want leftovers?

o Ans: 7 slices

o What if a student doesn’t eat their cake. What fraction of the cake is left uneaten?

o Ans: 1/7

Practice

o Write down the fractions of the different color part for these objects.

o Answers:o 1. 2/6 o 2. 3/7o 3. 5/10o 4. 3/6

1

2

3 4

Extra Help with Fractions at Home

o A great website that I found on fractions http://math.rice.edu/~lanius/fractions/index.html