# Adding and Subtracting Positive and Negative Fractions Using Counters

Unit 1: Rational Number Operations
Lesson 23 of 27

## Big Idea: Students model sums and differences of signed common (mostly common) denominator fractions to discover that integer procedures also work with fractions.

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Standards:
Subject(s):
Math, Number lines , Number Sense and Operations, 7th grade, signed fractions, counter model, rational numbers
50 minutes

### Grant Harris

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