CKMath Unit 4: Understanding Addition and Subtraction
Focus:
In this unit, students develop their understanding of addition and subtraction as they represent and solve story problems. They relate counting to the result of two actions: putting objects together or taking objects away. Students enact addition by counting the total number of objects in two groups, and subtraction by counting what remains after some objects are taken away.
Students then make sense of stories without questions and later solve story problems of two types—Add To, Result Unknown and Take From, Result Unknown. Students represent the problems in different ways, by acting them out, drawing, using numbers, or using objects. They are also introduced to expressions, a symbolic way to represent addition and subtraction. Later in the section, students connect expressions to pictures and story problems. They find the value of addition and subtraction expressions within 10.
Number of Lessons: 16 and 2 optional
Instruction Time:
Approximately 60 minutes
(Please note that each lesson is designed for one instructional block, and may be divided into shorter or longer segments based on teacher pacing and student needs.)
Additional Search Terms:
total • expressions • symbol • orientation • geometric
