Domain

Operations and Algebraic Thinking

Cluster

Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from.

Standard(s)

NC.K.OA.4 For any number from 1 to 9 find the number that makes 10 when added to the given number, e.g., by using objects or drawings, and record the answer with a drawing or equation.

Materials

20 counters, paper and pencil for drawing pictures and writing numbers to solve the problem.

Task

• Provide a pile of counters.  Show the student 4 counters.

• Say: Here are 4 counters.  How many more counters do you need to have 10 counters?  Show your thinking with objects, pictures or numbers.