Fractions as Division
November 24, 2014
Goal:
I will relate fractions as division to
fractions of a set!
Agenda
Application Problem
Divide Whole Numbers
Fractions as Division
Whole Class: Fractions as Division
Problem Set
Task
A star… A wish…
Application Problem
Olivia is half the age of her brother, Adam.
Olivia’s sister, Ava is twice as old as Adam.
Adam is 4 years old. How old is each sibling?
Use tape diagrams to show your thinking.
Divide Whole Numbers
1÷2= 1/2
29÷6= 29/6= 4 5/6
13÷5= 13/5= 2 3/5
5÷4= 5/4= 1 1/4
3÷10= 3/10
Fractions as Division
4÷2= 4/2= 2
6÷4= 6/4= 3/2= 1.5
3÷4= ¾= .75
2÷10= 2/10= .2
6 thirds= 6/3= 2
12 fourths= 12/4= 3
1/3 of 6=
• Make an array with 6 counters.
• Turn the counters to the red side and split the
6 counters into three equal parts.
• What is the division sentence for what you
just did?
1/3 of 6=
• If I wanted to show 1 third of this set, how
many counters should I turn over to yellow?
– Turn and talk
– This means that 1/3 of 6 is equal to ___2______
What is 2/3 of 6
4
¼ of 12=
3
Mrs. Smith has 8 apples. She wants to
give ¾ of the apples to her students. How
many apples will her students get?
¾ x 8/1
8x3= 24
4x1= 4
24/4= 6
6 apples
In a class of 24 students, 5/6 are boys. How many
boys are in the class?
24/1 x 5/6
24x5= 120
6x1= 6
120/6= 20 boys
How many girls?
1/5 x 24 = 4 girls
Problem Set
• This is an independent assignment. You will
have 10 minutes to complete the problem set.
• Do your best and turn it in when the timer
goes off.
New Flooring task
• Spokes person
• Time keeper
• Responsibility
• Encourager
• Discussion leader
A star… A wish
Be specific:
• Write one thing that you are doing really well
with.
• Write one thing that you are struggling with.