Illustrative Mathematics
Illustrative Mathematics: 3.oa Finding the Unknown in a Division Equation
This task shows an equation that elicits key misconceptions around equations and division. Aligns with 3.OA.A.4 and CCSS.Math.Content.3.OA.A.4 Determine the unknown whole number in a multiplication or division
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Better Lesson: Finding What's Missing
Third graders can solve real world problems using their understanding of multiplication and division and the relationship they share.
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Better Lesson: Quotients Just the Basics
Just like multiplication, addition, and subtraction, division problems involve patterns and there are methodical ways in which manipulatives can be used to solve division problems with small dividends and divisors of 1 through 10.
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Better Lesson: Multiply and Divide by 10
Counting by 10's is easy for students of this age. Knowing that base 10 can be used to help multiply and divide in the higher numbers by decomposing is critical. This lesson sets the base for future work.
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Better Lesson: Understanding Multiplication With Equal Groups
Third graders develop their understanding of multiplication by grouping objects into equal groups to model the factors and products.
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Better Lesson: Using the Multiplication and Division Relationship to Solve
Third graders can solve multiplication and division problems quickly by recognizing the relationship between the two operations.
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Better Lesson: The Multiplication and Division Connection
Third graders can solve multiplication and division problems quickly by recognizing the relationship between the two operations.
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Better Lesson: Humans vs Narwhals
Who's the REAL meat eater here? Let's do some math and find out!
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Better Lesson: Exploring the Idea of Division
Third graders will observe and try to model slightly above-level division problems as they practice expressing math questions and possible solutions in mathematical terms.