Mathematics » Introducing Fractions » Add and Subtract Fractions with Common Denominators

Key Concepts

Key Concepts

• If $$a,b,$$ and $$c$$ are numbers where $$c\ne 0$$, then $$\frac{a}{c}+\frac{b}{c}=\frac{a+c}{c}$$.
• If $$a,b,$$ and $$c$$ are numbers where $$c\ne 0$$, then $$\frac{a}{c}-\frac{b}{c}=\frac{a-c}{c}$$.