School Launch

Parent guide · Grade 2 Math · Unit 6

Lesson 6.4 Making Change

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
Find change from $1.
You need
  • A few real coins
  • 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: “How much money is shown?” Listen for: 50¢

  2. Say this: “Count up from the price to the money paid. From 65¢ to $1: 5¢ makes 70¢, a dime 80¢, two dimes $1.00. Change: 35¢.”

    Say this: “Or subtract: 100 − 65 = 35.”

    Say this: “Change: money given back when you pay more than the price.”

  3. Show: A loaf costs 64¢. You pay with $1.00. How much change do you get?

    Say this: “Subtract in cents: 100 − 64 = 36”

    Say this: “Check: 64 + 36 = 100”

    Say this: “Change: 36¢”

    Answer: 36¢

    Show: Mary buys a basket of figs for $0.55. She pays with $1.00. How much change does she get?

    Say this: “Work in cents: 100 − 55 = 45”

    Say this: “Check: 55 + 45 = 100”

    Say this: “45 cents = $0.45”

    Answer: $0.45. She gets $0.45 in change.

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

    Ask: A loaf costs 90¢. You pay with $1.00. How much change do you get?

    Listen for: 10¢

    If stuck: Subtract in cents: 100 − 90 = 10

    Ask: A loaf costs 55¢. You pay with $1.00. How much change do you get?

    Listen for: 45¢

    If stuck: Subtract in cents: 100 − 55 = 45

    Ask: A loaf costs 60¢. You pay with $1.00. How much change do you get?

    Listen for: 40¢

    If stuck: Subtract in cents: 100 − 60 = 40

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

    • Subtracting the wrong way: 65 − 100.

  6. Price items in cents. Your child buys with a dollar and you give change by counting up; then swap so your child is the shopkeeper.

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

    Listen for: Find change from $1.

  8. Count by 25s to 100. Count mixed coins: 25, 50, 60, 70, 75, 76.

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.