Unit 4
Understanding Addition and Subtraction
Unit Goals
Unit Narrative
In this unit, students develop their understanding of addition and subtraction as they represent and solve story problems.
Previously, students developed their counting skills. Students learn addition as an extension of counting through joining two groups and counting to find the total. Students also extend their counting through subtraction. They count to find and remove objects within a collection and then count what remains. (The word “total” is used instead of “sum” to avoid confusion with the word “some” or part of a whole.)
Students then represent and solve Add...
to access End-of-Unit Assessments.