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Parent guide · Grade 3 Math · Unit 5

Lesson 5.2 Facts of 9

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 25–30 minutes
Goal
Know the 9s facts and their patterns.
You need
  • Blocks or cubes
  • Pencil and crayons
Print
Worksheet A · Worksheet B · the lesson page (it also has a short video (4:01))

Steps

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

    • Ask: “8 × 10” Listen for: 80
    • Ask: “5 × 2” Listen for: 10
    • Ask: “2 × 10” Listen for: 20
    • Ask: “10 × 6” Listen for: 60
    • Ask: “5 × 9” Listen for: 45

  2. Say this: “In 9 × 7 = 63 the tens digit is one less than 7, and the digits add to 9.”

    Say this: “Or think 10 groups minus one group: 70 − 7 = 63.”

    Say this: “Pattern: something that repeats in a predictable way.”

  3. Show: 9 × 10 = ___

    Say this: “Nines: ten groups, take away one group. 10 × 10 = 100”

    Say this: “100 − 10 = 90”

    Answer: 90

    Show: 54 ÷ 9 = ___

    Say this: “Think multiplication: 9 × ___ = 54”

    Say this: “9 × 6 = 54”

    Answer: 6

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

    Ask: 4 × 9 = ___

    Listen for: 36

    If stuck: Nines: ten groups, take away one group. 4 × 10 = 40

    Ask: 9 × 2 = ___

    Listen for: 18

    If stuck: Nines: ten groups, take away one group. 2 × 10 = 20

    Ask: 9 × 1 = ___

    Listen for: 9

    If stuck: Nines: ten groups, take away one group. 1 × 10 = 10

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

    • Writing 9 × 7 = 73.

  6. Each player turns over two cards (1–10) and says the product. Higher product takes all four cards.

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

    Listen for: Know the 9s facts and their patterns.

  8. Fact drill every day for one minute. Goal by the end of the unit: all × facts through 10 × 10 in 3 seconds.

Spread over the week

5 sessions of 25–30 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.