Math lesson plan · 2nd grade (Year 3 in England) · 30 minutes
Value of each digit in a three-digit number
Number sense
CCSS 2.NBT.A.1England: Y2 Number and place valueEngland: Y3 Number and place value
Objective and success criteria
Students will: Value of each digit in a three-digit number.
- I can answer questions on today's skill on my own, without help.
- I can explain each step and say why it works.
- I can check my answer and spot a mistake.
Before and after
Needs first: Hundreds, tens and ones
Leads to: Write three-digit numbers in expanded form; Make the greatest and least number from digit cards
Materials: Place value chart, Base-ten blocks or a number line, Mini whiteboards and pens, Printed student sheet (below).
Warm-up · 4 min
- Quick retrieval from earlier learning (Hundreds, tens and ones). Students answer on mini whiteboards.
- Show answers together and note who needs support in the main task.
- What is the value of the digit 1 in 341? → 1Prompt: Which place is the digit in: hundreds, tens or ones?
- Write as a number: 400 + 90 + 1 → 491Prompt: Each part fills one place: hundreds, tens, ones.
- What is the value of the digit 4 in 124? → 4Prompt: Which place is the digit in: hundreds, tens or ones?
Hook · 3 min
- Show a number in the news or a price tag and ask what each digit is worth.
- Share the objective: Value of each digit in a three-digit number. Read the success criteria together.
I do: model it · 7 min
- Work through the example out loud, saying why you do each step, not just what you do.
- Example: In 639, what is the tens digit worth?
- Step 1: 639 = 600 + 30 + 9
- Step 2: 30
- Answer: 30
- Pause after each step and ask a student to say what comes next.
We do: guided practice · 6 min
- Do these together. Students try each step on whiteboards before you reveal it.
- Use the hints as prompts rather than giving the answer.
- In 789, what is the ones digit worth? → 9Prompt: Hundreds are on the left, then tens, then ones.
- Which number has 8 hundreds, 0 tens and 5 ones? (805 / 8005 / 850 / 508) → 805Prompt: A three-digit number has a hundreds digit, a tens digit and a ones digit.
You do: independent practice · 7 min
- Students work on the student sheet. Circulate and check the first two answers of every student early.
- Students who finish: write a question of their own for a partner, with the answer.
The 6 questions are on the student sheet below, with answers in the key.
Exit ticket · 3 min
- Two questions on their own. Sort answers into got it / nearly / not yet to plan the next lesson.
- Which number has 4 hundreds, 0 tens and 3 ones? (43 / 403 / 4003 / 430) → 403Prompt: A three-digit number has a hundreds digit, a tens digit and a ones digit.
- Which digit is in the tens place of 892? → 9Prompt: From the right: ones, tens, hundreds.
Watch out for
- Reading 1,045 as one thousand four hundred five: point to each place and say its value.
- Thinking a longer number is always bigger, even with decimals (0.45 vs 0.5).
Support and stretch
Support
- Review first: Hundreds, tens and ones.
- Use concrete materials: place value chart.
- Give the first step of each question, or a partly worked example to finish.
- Pair with a confident partner for the guided practice.
Stretch
- Move on to: Write three-digit numbers in expanded form; Make the greatest and least number from digit cards.
- Explain a common mistake in writing and how to fix it.
- Write a word problem that uses today's skill, then solve a partner's.
Homework and more practice
Free online practice with hints and printable worksheets for this skill: eurekami.com/math/grade-2.
Free lesson plan from eurekami.com/lesson-plan-builder