Lesson plan

# Determine an unknown quantity in a multiplication or division equation using multiples

teaches Common Core State Standards CCSS.Math.Content.3.OA.A.4 http://corestandards.org/Math/Content/3/OA/A/4
teaches Common Core State Standards CCSS.Math.Practice.MP1 http://corestandards.org/Math/Practice/MP1
teaches Common Core State Standards CCSS.Math.Practice.MP5 http://corestandards.org/Math/Practice/MP5
teaches Common Core State Standards CCSS.Math.Practice.MP6 http://corestandards.org/Math/Practice/MP6

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Big Idea: Multiples of numbers can be used to find unknown quantities involving equal shares in groups. This lesson builds on students' work with unknown quantities in multiplication and division word problems. This task uses an arcade ticket theme in which students use their knowledge of multiples to help Denise choose how many friends should get prizes using her 100 tickets. Students are presented with various prizes to purchase and must multiply and divide ticket amounts in order to purchase multiple prizes. By using multiples, students demonstrate how multiples can be an efficient strategy for solving multiplication and division problems involving equal groups. This lesson builds towards students' work using the properties of operations to solve word problems. Vocabulary: multiple, unknown quantity, equation