Lesson plan

Apply inverse operations by solving multiplication and division word problems

teaches Common Core State Standards CCSS.Math.Content.3.OA.C.7 http://corestandards.org/Math/Content/3/OA/C/7
teaches Common Core State Standards CCSS.Math.Practice.MP1 http://corestandards.org/Math/Practice/MP1
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7

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Big Ideas: Multiplication is the inverse operation of division. Fact families help show the relationship between multiplication and division. This lesson builds on students' work with interpreting division as an unknown factor. This task asks students to order three stacks of pancakes based on size, using division and multiplication to combine topping choices with pancake stacks. Ordering the stacks of pancakes based on the topping choices sets students up to fluently multiply and divide within 100, using strategies, inverse operations, and properties of operations in multiplication and division. Students reason about how inverse operations can help them become fluent in finding the products of two one-digit numbers. This lesson builds toward students' fluency in mental computation and properties of operations. Vocabulary: inverse operation, commutative property, fact families