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Parent guide · Grade 1 Math · Unit 2

Lesson 2.2 Doubles and Near Doubles

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
Know the doubles facts. Use a double to add a near double.
You need
  • Craft sticks and rubber bands
  • Pencil and crayons
Print
Worksheet A · Worksheet B · the lesson page (it also has a short video (2:17))

Steps

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

    • Ask: “0 + 6” Listen for: 6
    • Ask: “0 + 9” Listen for: 9
    • Ask: “4 + 5” Listen for: 9
    • Ask: “3 + 2” Listen for: 5
    • Ask: “6 + 0” Listen for: 6

  2. Say this: “Doubles are easy to remember: 6 + 6 = 12, 7 + 7 = 14.”

    Say this: “For 6 + 7, think 6 + 6 = 12, then one more is 13.”

    Say this: “Double: a number added to itself, like 6 + 6.”

    Say this: “Near double: two numbers one apart, like 6 + 7.”

  3. Show: 4 + 4 = ___

    Say this: “This is a double: 4 + 4 = 8”

    Answer: 8

    Show: Noah led 4 sheep into the ark, then 8 more. How many sheep went in?

    bar model

    Say this: “Unknown: the total.”

    Say this: “Bar model: two parts, 4 and 8; the whole is unknown.”

    Say this: “Equation: 4 + 8 = ?”

    Say this: “4 + 8 = 12”

    Say this: “Answer: 12 sheep went into the ark.”

    Answer: 12 sheep. 12 sheep went into the ark.

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

    Ask: 10 + 1 = ___

    Listen for: 11

    If stuck: Start at 10 and count on 1: 11.

    Ask: 3 + 6 = ___

    Listen for: 9

    If stuck: Start with the bigger number, 6, and count on 3: 7, 8, 9.

    Ask: 10 + 10 = ___

    Listen for: 20

    If stuck: This is a double: 10 + 10 = 20

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

    • Adding 2 instead of 1 to the double.

  6. Each player turns a card 1–10 and says its double. The bigger double wins both 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 doubles facts.; Use a double to add a near double.

  8. Recite the doubles (1 + 1 to 10 + 10) every day, then the make-ten pairs.

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.