Review using column subtraction with regrouping from tens to ones | Maths

Starter quiz

Complete the column subtraction by finding the difference.
- '23' ✓
Which number is the difference in this column subtraction?
- '221' ✓
Find the missing tens digit from the column subtraction.
- '8' ✓
Find the missing tens digit from the column subtraction.
- '6' ✓
Which two numbers could be used to make this column subtraction correct?
- 67
- 54
- 42 ✓
- 31 ✓
Which two numbers could be used to make this column subtraction correct?
- 987
- 766
- 625 ✓
- 856 ✓

Exit quiz

Which of these subtraction calculations need regrouping from the tens to the ones?
- A ✓
- B
- C ✓
Complete the column subtraction. What is the difference between the two numbers?
- '47' ✓
Complete the column subtraction. What is the difference between the two numbers?
- '228' ✓
Find the missing difference.
- '136' ✓
Find the missing ones digit in the column subtraction.
- '4' ✓
Find the missing ones digit in the column subtraction.
- '4' ✓

Worksheet

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Presentation

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Lesson Details

Key learning points

Regroup when the ones digit of the subtrahend is greater than the ones digit of the minuend.
Regroup a ten into 10 ones.
Change the number of ones and tens in the minuend.

Common misconception

Pupils may not understand how regrouping works with column subtraction.

Emphasise with pupils the size of the digits, referring to the tens and the ones. Model using Base 10 blocks so that pupils understand how regrouping works with column subtraction.

Keywords

Column subtraction - Column subtraction is a way of subtracting numbers by writing a number below another.
Regrouping - The process of unitising and exchanging between place values is known as regrouping.