Thinkabara

🧮 4th Grade · Math4.NBT.B.5Unit 4: Multi-digit multiplication

Two-digit by two-digit

Google Classroom

🎯 Objective: Students multiply two-digit numbers with an area model.

Lesson outline

  1. Draw 23 × 45 as a four-part area model (20 + 3 by 40 + 5).
  2. Find the four partial products and add: 800 + 100 + 120 + 15 = 1,035.
  3. Practice with estimation checks.
  4. Exit: 36 × 17.

Lesson 4 of 5 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.NBT.B.5

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

🏁 Unit goals

  • Multiply up to four digits by one digit and two digits by two digits
  • Explain with area models and partial products

✅ 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: Multi-digit multiplication📚 All 4th Grade skills🎮 Learning games⚡ Capy Live class quiz

🗓️ Plan the whole year like this

Add 4th Grade Math to your free Lesson Planner: enter your timetable once and every period shows the next lesson, skipping weekends and school breaks.

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More lessons in “Multi-digit multiplication”

  1. Multiplying by 10, 100 and 1,000
  2. Area model: one-digit multiplier
  3. Partial products
  4. Two-digit by two-digit
  5. Multiplication word problems

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