Use column addition to add numbers by regrouping tens
I can use column addition to add numbers by regrouping tens.
Use column addition to add numbers by regrouping tens
I can use column addition to add numbers by regrouping 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.
- If the sum of the tens digits is ten or greater, regrouping is needed.
- Any complete hundreds are regrouped into 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 add the 'regrouped' hundred when calculating the total for the hundreds column.
Model regrouping and finding column totals clearly, reminding pupils to add together all of the numbers in the column to get the total.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.How many tens are equal to 130?
Q2.70 + 70 =
Q3.Calculate the missing sum using column addition.
Q4.Calculate the missing sum using column addition.
Q5.What is the value of the digit 7 in this column addition?
Q6.What number is missing from this column addition?
Assessment exit quiz
6 Questions
Q1.150 can be regrouped into…
Q2.Match each tens numbers to the correct regrouping.
2 hundreds and 4 tens
4 hundreds and 2 tens
4 hundreds and 4 tens
Q3.Calculate the missing sum.
Q4.What tens digit is missing from this column addition?
Q5.What is the missing tens digit?
Q6.What is the missing tens digit?
