Grade 5 · Number and Operations—Fractions

CCSS.MATH.CONTENT.5.NF.A.2

Solve word problems involving addition and subtraction of fractions referring to the same whole, including cases of unlike denominators, e.g., by using visual fraction models or equations to represent the problem. Use benchmark fractions and number sense of fractions to estimate mentally and assess the reasonableness of answers.

Read this standard on the official Common Core site

Lessons that teach this standard

• Adding Fractions With Unlike Denominators

  How to add fractions with different bottom numbers: find a common denominator, rewrite both fractions, add the top numbers, then simplify. With mixed numbers too.

• Fraction Word Problems: Choosing the Right Operation

  How to decide whether a fraction word problem needs addition, subtraction, multiplication or division, with the signal words and worked solutions for each.