Adding & Subtracting Fractions with Unlike Denominators

2/5 + 3/10

• 7/10
• 5/10
• 1/2
• 5/15

8/9 - 1/3 = 

• 7/6
• 5/9
• 2/3
• 8/27

2/3 + 1/2 = 

• 6/7
• 2/6
• 3/5
• 7/6

1/3 + 5/12

• 6/12
• 6/15
• 3/4
• 4/4

3/5 + 7/10

• 13/10
• 10/15
• 10/5
• 15/15

1/4 + 5/8

• 6/8
• 6/12
• 7/8
• 8/8

What is the first step in solving this problem? 
⅘ + ½ =

• Add the top parts of the fraction
• Rewrite the fractions in the simplest form. 
• Find a common denominator. 
• Make each fraction into an improper faction. 

What is the least common denominator you could use to subtract 1/3 and 1/4?

• 3
• 4
• 24
• 12

3 ¹/₄ - 1 ⁴/₅

• 2 ³/₅

• 2 ¹/₄

• 1 ²/₅

• 1 ⁹/₂₀

2 ¹/₄ + 3 ¹/₆

• 5 ³/₄

• 5 ⁵/₁₂

• 5 ¹/₄

• 5 ¹/₂