Math lesson plan · 3rd grade (Year 4 in England) · 60 minutes
Round four-digit numbers to the nearest 10, 100 or 1000
Number sense
CCSS 3.NBT.A.1CCSS 4.NBT.A.3England: Y4 Number and place value
Objective and success criteria
Students will: Round four-digit numbers to the nearest 10, 100 or 1000.
- 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: Round to the nearest 10 or 100; Value of a digit in four-digit numbers
Leads to: the next skill in this area.
Materials: Place value chart, Base-ten blocks or a number line, Mini whiteboards and pens, Printed student sheet (below).
Warm-up · 6 min
- Quick retrieval from earlier learning (Round to the nearest 10 or 100; Value of a digit in four-digit numbers). Students answer on mini whiteboards.
- Show answers together and note who needs support in the main task.
- In 4712, which place is the digit 2 in? (ones / tens / hundreds / thousands) → onesPrompt: Name the places from the right: ones, tens, hundreds, thousands.
- Which number rounds to 30 when rounded to the nearest 10? (35 / 24 / 26) → 26Prompt: Numbers from 25 up to 34 round to 30.
- In 9106, which place is the digit 6 in? (ones / tens / hundreds / thousands) → onesPrompt: Name the places from the right: ones, tens, hundreds, thousands.
Hook · 6 min
- Show a number in the news or a price tag and ask what each digit is worth.
- Share the objective: Round four-digit numbers to the nearest 10, 100 or 1000. Read the success criteria together.
I do: model it · 12 min
- Work through the example out loud, saying why you do each step, not just what you do.
- Example: Round 4985 to the nearest thousand.
- Step 1: 4985 is between 4000 and 5000. The hundreds digit is 9.
- Step 2: 5000
- Answer: 5000
- Pause after each step and ask a student to say what comes next.
We do: guided practice · 12 min
- Do these together. Students try each step on whiteboards before you reveal it.
- Use the hints as prompts rather than giving the answer.
- Round 9132 to the nearest thousand. → 9000Prompt: Which two thousands is 9132 between?
- A school library has 4848 books. Ana says that is about 4800 to the nearest hundred. Which digit did Ana look at to decide? (the ones digit / the tens digit / the hundreds digit / the thousands digit) → the tens digitPrompt: You always look at the place just to the right of the one you round to.
You do: independent practice · 17 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 8 questions are on the student sheet below, with answers in the key.
Exit ticket · 7 min
- Two questions on their own. Sort answers into got it / nearly / not yet to plan the next lesson.
- Round 1131 to the nearest thousand. → 1000Prompt: Which two thousands is 1131 between?
- A school library has 2308 books. Chloe says that is about 2300 to the nearest hundred. Which digit did Chloe look at to decide? (the ones digit / the tens digit / the hundreds digit / the thousands digit) → the tens digitPrompt: You always look at the place just to the right of the one you round to.
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: Round to the nearest 10 or 100.
- 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
- 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-3.
Free lesson plan from eurekami.com/lesson-plan-builder