Thinkabara

🧮 4th Grade · Math4.NF.B.3bUnit 7: Adding & subtracting fractions

Decomposing fractions

Google Classroom

🎯 Objective: Students write a fraction as a sum of unit fractions in several ways.

Lesson outline

  1. Write 5/8 = 1/8 + 1/8 + 3/8 and = 2/8 + 3/8.
  2. Model with strips.
  3. Find three ways for 7/10.
  4. Exit: two ways to write 4/5.

Lesson 1 of 6 in this unit. In the Lesson Planner this lesson takes 1–3 class periods depending on your timetable: day 1 introduce & model, then practice, small-group reteach and a quick check.

📐 Standard

4.NF.B.3b

Common Core State Standards for Mathematics, Grade 4 — typical US scope & sequence

🏁 Unit goals

  • Add and subtract fractions and mixed numbers with like denominators
  • Decompose fractions in more than one way

✅ Check for understanding

End with the exit ticket in the outline. Sort answers into got it / almost / not yet and start the next lesson with a 5-minute reteach for the “not yets”.

Practice & resources on Thinkabara

🎯 Practice: Equivalent fractions🎯 Practice: Decimals to hundredths📚 All 4th Grade skills🎮 Learning games⚡ Capy Live class quiz

🗓️ Plan the whole year like this

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More lessons in “Adding & subtracting fractions”

  1. Decomposing fractions
  2. Adding like fractions
  3. Subtracting like fractions
  4. Mixed numbers
  5. Adding and subtracting mixed numbers
  6. Fraction word problems

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