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🧮 1st Grade · Math1.NBT.C.6Unit 8: Adding & subtracting with tens

Subtracting tens

Google Classroom

🎯 Objective: Students subtract multiples of 10 from multiples of 10 (70 − 30).

Lesson outline

  1. Model with ten rods.
  2. Relate to 7 − 3.
  3. Hundred chart practice: move up rows.
  4. Exit: 90 − 40.

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

1.NBT.C.6

Common Core State Standards for Mathematics, Grade 1 — typical US scope & sequence

🏁 Unit goals

  • Add a two-digit number and a one-digit number or a multiple of 10
  • Subtract multiples of 10

✅ 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: Place value to 120📚 All 1st Grade skills🎮 Learning games⚡ Capy Live class quiz

🗓️ Plan the whole year like this

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More lessons in “Adding & subtracting with tens”

  1. Adding tens
  2. Adding ones without regrouping
  3. Making a new ten
  4. Subtracting tens
  5. Two-digit story problems

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