Fractions with Borrowing

Grade 4 / Math / Fractions
CCSS: Math.5.NF.A.1

Common Core State Standards




Grade 5


Numbers & Operations--Fractions


Use equivalent fractions as a strategy to add and subtract fractions


Add and subtract fractions with unlike denominators (including mixed numbers) by replacing given fractions with equivalent fractions in such a way as to produce an equivalent sum or difference of fractions with like denominators. For example, 2/3 + 5/4 = 8/12 + 15/12 = 23/12. (In general, a/b + c/d = (ad + bc)/bd.)

Download Common Core State Standards (PDF 1.2 MB)
Lesson Objective
Use decomposition to subtract fractions and mixed numbers
14 min
Questions to Consider
How do the pizzas help students explain what borrowing 'looks' like with fractions?
Why is the 'think aloud' an important part of making our thinking transparent?
What strategies does Ms. Gonzalez use to check for student understanding?

Supporting Materials

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  • Transcript for Tough to Teach – Fractions With Borrowing

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