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🧮 1st Grade · Math1.NBT.C.5Unit 7: Comparing two-digit numbers

Ten more and ten less

Google Classroom

🎯 Objective: Students mentally find 10 more and 10 less than a two-digit number.

Lesson outline

  1. Use a hundred chart: move down a row for ten more.
  2. Model with base-ten blocks.
  3. Partners quiz each other.
  4. Exit: 10 more than 46, 10 less than 70.

Lesson 3 of 4 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.5

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

🏁 Unit goals

  • Compare two-digit numbers using tens and ones
  • Record comparisons with >, = and <

✅ 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

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More lessons in “Comparing two-digit numbers”

  1. Compare with tens and ones
  2. The symbols >, = and <
  3. Ten more and ten less
  4. Ordering numbers

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