Column addition is a way of adding numbers by writing a number below another.

The process of unitising and exchanging between place values is known as regrouping.

Review using column addition with regrouping in the ones and tens columns

Maths

Review column addition and identify the addends and sum

Review and use knowledge of place value to correctly lay out column addition

Review adding 2-digit numbers using column addition without regrouping

Review adding 3-digit numbers using column addition without regrouping

Use column addition to solve problems in different contexts

Review using column addition to add 2- and 3-digit numbers by regrouping ones

Review using column addition to add 2- and 3-digit numbers by regrouping tens

Review using known facts and strategies to accurately and efficiently use and check column addition

Use knowledge of column addition to solve problems in a range of contexts

Review identifying the minuend and subtrahend in column subtraction

Review using column subtraction to subtract without regrouping

Review using column subtraction with regrouping from tens to ones

Review using column subtraction with regrouping from hundreds to tens

Decide on the most efficient subtraction strategy, including column subtraction

In this unit pupils will revisit column addition with regrouping and column subtraction with exchanging to solve problems. In the future unit pupils will consolidate column addition with regrouping and column subtraction with exchanging to solve problems. They will use known facts and strategies to accurately and efficiently calculate and check.

In the prior unit pupils identified the minuend and the subtrahend in column subtraction and explained the column subtraction algorithm. They subtracted from a 2-digit number using column subtraction with exchanging. In this unit pupils will revisit column addition with regrouping and column subtraction with exchanging to solve problems.

In this unit pupils will revisit column addition with regrouping and column subtraction with exchanging to solve problems.

Review of column addition and subtraction

Which calculations need regrouping in the ones and tens?

Regrouping is needed in the ones and tens.

Look at this column addition. Which statement is true?

Which two of the numbers below have a sum of 474? Use column addition to help check your answer.

What is the missing digit in this column addition?

Which calculation needs regrouping in the ones?

Which calculation needs regrouping in the tens?

Which two of the numbers below have a sum of 92? Use column addition to help you work out the answer. 

Which two of the numbers below have a sum of 332? Use column addition to help you work out the answer. 

Review using column addition with regrouping in the ones and tens columns

Lesson outcome