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

In this unit pupils will revisit column addition with regrouping and column subtraction with exchanging to solve problems. They will read Roman numerals to 100. 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. They will read Roman numerals to 100.

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. 

This lesson will soon be taken down.

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

Lesson outcome