Lesson Plan

Represent a word problem involving fraction addition or subtraction with an equation that uses fractions referring to the same whole

Select and use a visual fraction model (fraction bar, area model, or number line) to represent and solve a word problem involving unlike denominators

Estimate the answer to a fraction addition or subtraction problem using benchmark fractions (0, 1/4, 1/3, 1/2, 2/3, 3/4, 1) before computing

Assess the reasonableness of a computed answer by comparing it to a benchmark estimate, and identify answers that are clearly incorrect

Solve joining, separating, comparing, and part-part-whole word problems involving fractions and mixed numbers with unlike denominators

5.NF.A.2

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. For example, recognize an incorrect result 2/5 + 1/2 = 3/7, by observing that 3/7 < 1/2.