Lesson plan

10. Solving Candy Store Problems (A)

teaches Common Core State Standards CCSS.Math.Content.1.OA.A.1 http://corestandards.org/Math/Content/1/OA/A/1
teaches Common Core State Standards CCSS.Math.Practice.MP1 http://corestandards.org/Math/Practice/MP1

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Lesson objective: Solve problems involving addition and subtraction of whole numbers within 20.

This lesson provides an opportunity for students to apply their knowledge and understanding of addition and subtraction to a real-life situation. Students are asked to use a table listing bags of jelly beans and the number in each bag to solve addition and subtraction problems. 

Key Concept students will use: 

  • We can count on or make ten to add and subtract within 20, and the total or difference stays the same regardless of the strategy we use.

Skills students will use:

  • Compose and decompose numbers within 10. (K.OA.10 - Kindergarten, Units 10 and 16)
  • ​Read and write numbers to 20. (K.CC.1 - Kindergarten Units 2 and 7)
  • Find the sum of single digit numbers to 10. (K.OA.4 - Kindergarten, Units 4, 6, 10, and 16)
  • ​Count on to 100 from a number other than 1. (K.CC.2 - Kindergarten, Unit 14)
  • Add and subtract within 10. (K.OA.2 - Kindergarten, Unit 10)

Students engage in Mathematical Practice 1 (Students make sense of problems and persevere in solving them) as they examine a table and decide on the quantity of jelly beans to use to complete and solve additional and subtraction word problems.

Key vocabulary: 

  • add
  • equals
  • makes
  • problem
  • solve
  • subtract

Special materials needed:

  • counters or linking cubes