Learning Goal
Part of: Use equivalent fractions as a strategy to add and subtract fractions — 2 of 2 cluster items
Solve word problems involving addition and subtraction of fractions
**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.
Show moreShow less
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.
What you'll learn
- 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
Prerequisites
Slides
Interactive presentations perfect for visual learners • Interactive presentation
Slide Video
Watch narrated slides play like a video lesson • Narrated slide playback