I can find the number that makes 10 when added to the given number
Challenge problem 1 for K.OA.4. Explain your thinking.
Challenge problem 2 for K.OA.4. Show multiple solutions.
Challenge problem 3 for K.OA.4. Create your own example.
Challenge problem 4 for K.OA.4. Teach someone else.
Challenge problem 5 for K.OA.4. Find patterns.
Challenge problem 6 for K.OA.4. Make connections.
Challenge problem 7 for K.OA.4. Solve creatively.
Challenge problem 8 for K.OA.4. Justify your answer.
Challenge problem 9 for K.OA.4. Extend the concept.
Challenge problem 10 for K.OA.4. Design a new problem.