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Learn how to solve rectangle problems using division and multiplication. Experiment with different block counts and groupings to understand the relationship between these key mathematical operations.
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This is the side of a rectangle with 16 blocks total. There is a height of 4 4x?=16 How can you solve this problem?
This is the other side of the rectangle. If you divide 16 into groups of 4 you will have 4 groups.
This is the side of a rectangle with 21 blocks total. There is a height of 3. Can you write a multiplication sentence for this? How can you solve this problem?
This is the other side of the rectangle. If you divide 21 into groups of 3 you will have 7 groups. 21/3=7 3x7=21
This is a division problem with 3 groups, there are 4 blocks in each group how much in all? The divisionsentence for this is ?/3=4 How can you solve this problem?
Here is there other side of the model. There are 12 blocks in total. If you multiply 3 x 4 you will 12 in all. 3x4=12 12/3=4
This is a division problem with 4 groups, there are 6 blocks in each group how much in all? The division sentence for this is ?/4=6 How can you solve this problem?
Here is there other side of the model. There are 24 blocks in total. If you multiply 6 x 4 you will 24 in all. 6x4=24 24/4=6
The Big Idea You can use division to find unknown multiplication numbers and You can use multiplication to find unknown division numbers