This lesson teaches how to solve addition problems using number lines. It covers understanding different scales on number lines, common mistakes like miscounting units, and applying these concepts to solve both simple and complex addition problems. The lesson concludes with a story problem to demonstrate practical application.

Describe the process of adding 30 plus 48 using a number line.

What is the height of Tom's sister if Tom is 52 inches tall and she is 11 inches taller?

Summarize what you learned about solving addition problems in this lesson.