New
New
Year 3

Use column subtraction to subtract from a 2- or 3-digit number

I can use column subtraction to subtract from a 2- or 3-digit number.

New
New
Year 3

Use column subtraction to subtract from a 2- or 3-digit number

I can use column subtraction to subtract from a 2- or 3-digit number.

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Lesson details

Key learning points

1. Start by subtracting the number with the smallest place value first.
2. The minuend always appears first in a column subtraction.
3. The subtrahend is written underneath the minuend.

Common misconception

Pupils may make errors when subtracting zero or when writing zero in the ones, tens or hundreds column of the difference.

Encourage pupils to write zero, using the examples given in the slide deck. Write zero in the hundreds column of the difference when using column subtraction; explain this is not written when the calculation is presented as a horizontal equation.

Keywords

• Minuend - The minuend is the number being subtracted from.

• Subtrahend - A subtrahend is a number subtracted from another.

• Column subtraction - Column subtraction is a way of subtracting numbers by writing a number below another.

Pupils may find base ten blocks helpful in representing and understanding column subtraction. Explain that only the minuend needs to be represented. The subtrahend is subtracted from this.
Teacher tip

Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

Starter quiz

6 Questions

Q1.
Which number in the bar model is the minuend?
21
55
Q2.
Which number in this equation is the difference? 65 − 42 = 23
65
42
Q3.
Which number in this column subtraction is the minuend?
Q4.
What is the name of the part that is circled in the column subtraction?
Difference
Minuend
Q5.
Which equation exactly matches the column subtraction?
45 − 14 = 31
45 = 31 + 14
Correct answer: 45 − 31 = 14
14 + 31 = 45
Q6.
Which column subtraction shows the correct difference?
b)
c)

Exit quiz

6 Questions

Q1.
Which number in the column subtraction is the minuend?
52
42
Q2.
Which number in the column subtraction is the subtrahend?
Q3.
Calculate the missing difference using the column subtraction.
13
14