Summary: Adding and Subtracting Fractions With Common Denominators

Key Concepts

• Fraction Addition
  • If [latex]a,b[/latex], and [latex]c[/latex] are numbers where [latex]c\ne 0[/latex] , then [latex]\frac{a}{c}+\frac{b}{c}=\frac{a+c}{c}[/latex] .
  • To add fractions, add the numerators and place the sum over the common denominator.
• Fraction Subtraction
  • If [latex]a,b[/latex], and [latex]c[/latex] are numbers where [latex]c\ne 0[/latex] , then [latex]\frac{a}{c}-\frac{b}{c}=\frac{a-c}{c}[/latex] .
  • To subtract fractions, subtract the numerators and place the difference over the common denominator.

Licenses & Attributions