Use column addition with regrouping in ones and tens
I can use column addition with regrouping in the ones and tens.
Use column addition with regrouping in ones and tens
I can use column addition with regrouping in the ones and tens.
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Lesson details
Key learning points
- When using column addition, start by adding the numbers with the smallest place value first.
- Make sure that any regrouped 10s are added with the values in the tens column.
- Make sure that any regrouped 100s are added with the values in the hundreds column.
Keywords
Column addition - Column addition is a way of adding numbers by writing a number below another.
Regroup - The process of unitising and exchanging between place values is known as regrouping.
Common misconception
Pupils may forget to refer to the size of the numbers when adding and when regrouping.
Encourage pupils to talk about the place value of the digits. Ten ones can be regrouped as a ten; ten tens can be regrouped as a hundred.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.170 can be regrouped into…
Q2.9 + 8 =
Q3.What number is missing from this column addition?
Q4.What is the sum of the two numbers?
Q5.What number is missing from this column addition?
Q6.What tens digit is missing from this column addition?
Assessment exit quiz
6 Questions
Q1.Where will regrouping be needed in this column addition?
Q2.Where will regrouping be needed in this column addition?
Q3.Jun has started this column addition. Complete it to find the sum.
Q4.The same digit is missing from both boxes. What is the number?
Q5.What is the missing tens digit?
Q6.What is the missing sum?
