Math lesson plan · 4th grade (Year 5 in England) · 45 minutes
Multiply a four-digit number by a one-digit number
Multiplication and division
CCSS 4.NBT.B.5England: Y5 Multiplication and division
Objective and success criteria
Students will: Multiply a four-digit number by a one-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: Multiply a three-digit number by a one-digit number
Leads to: the next skill in this area.
Materials: Counters for arrays, Multiplication grid, Base-ten blocks, Mini whiteboards and pens, Printed student sheet (below).
Warm-up · 5 min
- Quick retrieval from earlier learning (Multiply a three-digit number by a one-digit number). Students answer on mini whiteboards.
- Show answers together and note who needs support in the main task.
- 813 × 5 = ? → 4065Prompt: Multiply the hundreds, tens and ones separately.
- There are 6 tanks with 272 fish in each. How many fish are there altogether? → 1632Prompt: You need 6 × 272.
- Mateo did 117 × 8 in columns and got 886. Mateo forgot to carry. What is the correct answer? → 936Prompt: 7 × 8 = 56. What should be carried to the tens?
Hook · 5 min
- Show an array of chairs, eggs or windows and ask how many there are without counting one by one.
- Share the objective: Multiply a four-digit number by a one-digit number. Read the success criteria together.
I do: model it · 10 min
- Work through the example out loud, saying why you do each step, not just what you do.
- Example: 8079 × 2 = ?
- Step 1: 8000 × 2 = 16000
- Step 2: 70 × 2 = 140
- Step 3: 9 × 2 = 18
- Step 4: 16000 + 140 + 18 = 16158
- Answer: 16158
- Pause after each step and ask a student to say what comes next.
We do: guided practice · 10 min
- Do these together. Students try each step on whiteboards before you reveal it.
- Use the hints as prompts rather than giving the answer.
- 5041 × 9 = ? → 45369Prompt: Use the column method, starting with the ones.
- A school orders 5 boxes of paper. Each box has 1921 sheets. How many sheets is that? → 9605Prompt: Work out 1921 × 5.
You do: independent practice · 10 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 · 5 min
- Two questions on their own. Sort answers into got it / nearly / not yet to plan the next lesson.
- 9962 × 3 = ? → 29886Prompt: Use the column method, starting with the ones.
- A school orders 7 boxes of paper. Each box has 1682 sheets. How many sheets is that? → 11774Prompt: Work out 1682 × 7.
Watch out for
- Thinking multiplying always makes a number bigger.
- Dropping a zero in long multiplication when moving to the tens row.
Support and stretch
Support
- Review first: Multiply a three-digit number by a one-digit number.
- Use concrete materials: counters for arrays.
- 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-4.
Free lesson plan from eurekami.com/lesson-plan-builder