# Adding and Subtracting in Columns

Unit 17: Getting Better at Addition and Subtraction
Lesson 11 of 12

## Big Idea: Students are working to develop their fluency with adding and subtracting numbers to 100. Working with numbers in columns reinforces place value understanding.

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Standards:
Subject(s):
Math, Place Value, Number Sense and Operations, addition, subtraction, manipulatives, algorithm, Operations
30 minutes

### Beth McKenna

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