Numerical Relationships and Algebraic Thinking · Operations and Algebraic Thinking
The Logic of Addition and Subtraction
Developing an understanding of addition as putting together and subtraction as taking apart or finding a difference.
Key Questions
- 1How does knowing a part-part-whole relationship help us solve for a missing number?
- 2Why can we use addition to check if our subtraction answer is correct?
- 3When we change the order of numbers in addition, why does the total stay the same?
Common Core State Standards
CCSS.Math.Content.1.OA.B.3CCSS.Math.Content.1.OA.C.6
Grade: 1st Grade
Subject: Mathematics
Unit: Numerical Relationships and Algebraic Thinking
Period: Operations and Algebraic Thinking
Suggested Methodologies
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