Chapter 5 Big Idea:
Using bar models to solve 2-step, real-world problems involving addition and subtraction was the main focus of this chapter.
· Students applied the part-whole concept in addition and subtraction to numbers to 10,000.
· Students used strategies, such as adding on and taking away sets represented by bar models, to add and subtract.
· Students compared two sets, using bar models.
In this chapter, students learned to solve one step real-world problems and two-step real-world problems where a solution for the second step requires and answer from the first step. Students learned to solve these problems by applying addition and subtraction concepts