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Parent guide · Grade 1 Math · Unit 9

Lesson 9.2 Place Value Review

Written for the parent. Read the Say this lines aloud as they are, or in your own words. Answers for you are marked Listen for.

At a glance

Time
5 sessions of 20–25 minutes
Goal
Review tens and ones to 120.
You need
  • Pencil and crayons
Print
Worksheet A · Worksheet B · the lesson page

Steps

  1. Do this: Ask these out loud. Your child answers out loud; no paper needed.

    • Ask: “4 + 8” Listen for: 12
    • Ask: “6 + 2” Listen for: 8
    • Ask: “8 + 6” Listen for: 14
    • Ask: “8 + 7” Listen for: 15
    • Ask: “1 + 5” Listen for: 6

  2. Say this: “The left digit counts tens; the right digit counts ones.”

    Say this: “Compare tens first.”

  3. Show: Write <, > or = : 74 ___ 101

    Say this: “74 has 2 digits and 101 has 3. More digits means greater.”

    Say this: “74 < 101”

    Answer: 74 < 101

    Show: What number is ten less than 79?

    Say this: “79 − 10 = 69”

    Answer: 69

  4. Do this: Your child does these with you. Let them try first; help only after a real try.

    Ask: How many tens and ones are in 92?

    Listen for: 9 tens 2 ones

    If stuck: The tens digit is 9: 9 tens = 90.

    Ask: How many tens and ones are in 95?

    Listen for: 9 tens 5 ones

    If stuck: The tens digit is 9: 9 tens = 90.

    Ask: How many tens and ones are in 40?

    Listen for: 4 tens 0 ones

    If stuck: The tens digit is 4: 4 tens = 40.

    7 more practice items on the lesson page, and on Worksheet A and Worksheet B.

    • Reversing digits.

  6. Sit in a circle (or go room to room). Answer a flashcard fact before the next player to move on. Go around the house!

  7. Say this: “Tell me what you learned today. Show me with your hands or the counters if you like.”

    Listen for: Review tens and ones to 120.

  8. Mixed fact flashcards to 20, then count by tens from any number.

Spread over the week

5 sessions of 20–25 minutes. Stop while it is still going well.

  1. Session 1. Warm-up, then teach the new idea (steps 1 and 2).
  2. Session 2. Warm-up again, then show how with the examples.
  3. Session 3. Practice together, then play the game.
  4. Session 4. More practice on the worksheet, and the daily habit.
  5. Session 5. Quick check: narration and a few practice items. Move on when it is mostly right.