New
New
Use column addition to add numbers by regrouping ones
I can use column addition to add numbers by regrouping ones.
Lesson 6 of 10
New
New
- Year 3
Use column addition to add numbers by regrouping ones
I can use column addition to add numbers by regrouping ones.
Lesson details
Key learning points
- Start with the ones column so that regrouping can be represented
- If the sum of the ones digits is ten or greater, regrouping is needed
- Any complete tens are regrouped into the tens column
Keywords
Column addition - Column addition is a way of adding numbers by writing a number below another.
Regroup - Regroup means moving an amount to make a calculation easier.
Common misconception
Pupils may regroup incorrectly, forget to write the regrouped ten or forget to add any regrouped tens when calculating the total for the tens column.
Emphasise that the regrouped number is a ten and that it needs to be added to the tens total. If necessary, revisit the use of base ten blocks.
Pupils may find base ten blocks helpful, particularly at the start of the session. Ensure that pupils understand regrouping before moving on to introduce the more abstract version of the column addition algorithm.
Teacher tip
Licence
This content is © Oak National Academy Limited (2025), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Calculate the missing sum.
Calculate the missing sum.
Q2.Calculate the missing number in the column addition.
Calculate the missing number in the column addition.
Q3.Calculate the missing sum.
Calculate the missing sum.
533
531
432
Q4.Find the value of the missing digit in the column addition.
Find the value of the missing digit in the column addition.
Q5.What is the missing addend in the column addition?
What is the missing addend in the column addition?
Q6.What is the missing addend in the column addition?
What is the missing addend in the column addition?
Assessment exit quiz
6 Questions
Q1.13 can be regrouped into…
13 can be regrouped into…
1 ten and 5 ones
3 tens and 1 one
Q2. Match each ones numbers to the correct regrouping.
Match each ones numbers to the correct regrouping.
Q3.Calculate the missing sum.
Calculate the missing sum.
Q4.Calculate the missing number in the column addition.
Calculate the missing number in the column addition.
Q5.What is the missing sum?
What is the missing sum?
260
273
370
Q6.What is the missing number in the column addition?
What is the missing number in the column addition?
