Parent guide · Grade 2 Math · Unit 9
Lesson 9.3 Word Problems
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 word problems with bar models.
- You need
- Pencil and crayons
- Worksheet A · Worksheet B · the lesson page
Steps
Do this: Ask these out loud. Your child answers out loud; no paper needed.
- Ask: “5 + 4” Listen for: 9
- Ask: “2 + 5” Listen for: 7
- Ask: “3 + 8” Listen for: 11
- Ask: “7 + 8” Listen for: 15
- Ask: “4 + 8” Listen for: 12
Say this: “Draw the bar model before choosing an operation.”
Say this: “Answer with a sentence and units.”
Show: Jacob has 76 goats and Laban has 50 goats. How many more goats does Jacob have?
Say this: “Unknown: the difference.”
Say this: “Bar model: a long bar of 76 and a short bar of 50; the difference is unknown.”
Say this: “Equation: 76 − 50 = ?”
Say this: “76 − 50 = 26”
Say this: “Answer: Jacob has 26 more goats.”
Answer: 26 goats. Jacob has 26 more goats.
Show: At the market a loaf costs $0.45 and a jar of honey costs $0.98. How much do both cost?
Say this: “Work in cents: 45 + 98 = 143”
Say this: “143 cents = $1.43”
Answer: $1.43. Both cost $1.43.
Do this: Your child does these with you. Let them try first; help only after a real try.
Ask: The baker made 56 rolls and 45 loaves. How many pieces of bread did she make?
Listen for: 101 pieces. She made 101 pieces of bread.
If stuck: Unknown: the total.
Ask: Farmer Eli gathered 61 eggs in the morning and 32 eggs in the evening. How many eggs did he gather in all?
Listen for: 93 eggs. Eli gathered 93 eggs in all.
If stuck: Unknown: the total.
Ask: The orchard had 66 apples on a tree. The children picked 58. How many apples are left on the tree?
Listen for: 8 apples. 8 apples are left.
If stuck: Unknown: how many are left.
7 more practice items on the lesson page, and on Worksheet A and Worksheet B.
- Skipping the drawing on harder problems.
Write ten problems on cards around the house. Your child runs to each card, solves it and brings it back. Time the round; try to beat it.
Say this: “Tell me what you learned today. Show me with your hands or the counters if you like.”
Listen for: Review word problems with bar models.
Mixed fact drill daily. Count by 5s, 10s, 25s and 100s.
Spread over the week
5 sessions of 20–25 minutes. Stop while it is still going well.
- Session 1. Warm-up, then teach the new idea (steps 1 and 2).
- Session 2. Warm-up again, then show how with the examples.
- Session 3. Practice together, then play the game.
- Session 4. More practice on the worksheet, and the daily habit.
- Session 5. Quick check: narration and a few practice items. Move on when it is mostly right.