LESSON 3: Interpreting and Computing Division of a ...
LESSON 3: Interpreting and Computing Division of a Fraction by a Fraction-More
Models
Classwork:
Opening Exercise:
Draw a model to represent 12 ÷ 3.
12
| | | |
4
One large box representing 12 divided into 3 sections. Making each section
worth 4.
How could we reword this question?
If we divide 12 into three groups of equal size, what is the size of each group?
If we divide 12 into groups of 3, how many groups would we have?
If we have 12 chickens and we put 3 chickens in each cage, how many cages will we need?
If we have 12 flowers and we place 3 flowers in each base, how many vases will we need?
Example 1: 1
[pic] [pic]
1
Draw a model to show the division problem.
[pic]
| | | | | |
[pic] [pic]
1 + 1 = 2
3 1
3. [pic] [pic]
1 1
[pic]
[pic] | [pic] | [pic] | [pic] | [pic] | [pic] | [pic] | [pic] | [pic] | [pic] | [pic] | [pic] | |
[pic] [pic] [pic]
1 + 1 + 1 = 3
1
4. [pic] [pic]
1
[pic]
[pic] | [pic] | [pic] | [pic] | [pic] | [pic] | [pic] | [pic] | |
[pic] [pic] [pic]
1 + 1 + 1 + [pic] = 3[pic]
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