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Recap: Adding and Subtracting

Part of the Factors & Fractions section of Coddy's Pre-Algebra journey. Lesson 31 of 56.

Challenge

Work out $\frac{2}{3}+\frac{1}{5}-\frac{1}{2}$ .

Try it yourself

\frac{2}{3}+\frac{1}{5}-\frac{1}{2}

Simplify

All lessons in Factors & Fractions

1Factors and Multiples

What a Factor Is Divisibility Rules Multiples Prime or Composite Recap: Factors and Multiples

4What a Fraction Is

Parts of a Whole Fractions on the Line A Fraction of a Number Improper Fractions Recap: What a Fraction Is

7Multiplying Fractions

Top Times Top Cancel First Whole Times Fraction A Fraction of a Fraction Recap: Multiplying Fractions

10Fractions in Stories

Part of a Group What Is Left Sharing a Fraction Scaling a Recipe Recap: Fraction Stories

2Prime Factorization

Factor Trees One Tree per Number Using Exponents Recap: Prime Factorization

5Equivalent Fractions

Same Amount, New Name Simplifying Fractions Simplify in Steps Comparing Fractions Recap: Equivalent Fractions

8Dividing Fractions

How Many Fit Multiply by the Reciprocal Dividing by a Whole Number How Many Bags Recap: Dividing Fractions

11Final Challenges

Final: Brackets and Bars Final: Mixed and Divided Final: The Gift Ribbon Final: The Missing Prime Final: Fractions on the Line

3GCF and LCM

Greatest Common Factor GCF from Prime Factors Least Common Multiple LCM from Prime Factors GCF or LCM?Recap: GCF and LCM

6Adding and Subtracting

Same Denominator Different Denominators Subtracting Fractions The Least Common Denominator Negative ResultsRecap: Adding and Subtracting

9Mixed Numbers

Mixed to Improper Improper to Mixed Adding Mixed Numbers Multiplying Mixed Numbers Recap: Mixed Numbers