Add/Subtract Fractions & Mixed Numbers

What number could be a common denominator for these two fractions?
1/5   and   5/6?

• 30
• 11
• 6
• 5

What must you have to add and subtract fractions?

• Common numerators
• Different numerators
• Different denominators
• Common denominators

8/9 - 1/3 = 

• 7/6
• 5/9
• 2/3
• 8/27

• 4 ¹¹/₃₀

• 2 ¹/₃₀

• 2 ¹¹/₃₀

• 4 ²/₁₁

• 8 ¹¹/₁₂

• 2 ⁵/₁₂

• 8 ¹/₁₂

• 2 ¹/₁₂

• 8 ¹¹/₁₂

• 2 ⁵/₁₂

• 8 ¹/₁₂

• 2 ¹/₁₂

• 8 ²³/₄₀

• 4 ⁷/₄₀

• 8 ²²/₄₀

• 4 ²/₄₀

• 8 ²³/₄₀

• 4 ⁷/₄₀

• 8 ²²/₄₀

• 4 ²/₄₀

• 6 ⁵/₁₂

• 1 ¹¹/₁₂

• 6 ⁵/₂₄

• 2 ¹/₁₂

• 6 ⁵/₁₂

• 1 ¹¹/₁₂

• 6 ⁵/₂₄

• 2 ¹/₁₂