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. For example, 10 tens can be regrouped as one hundred and one hundred can be regrouped as 10 tens.

Add up to 3 four-digit numbers using column addition

Maths

In this 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 future unit pupils will use their knowledge to calculate with decimal numbers using column addition and subtraction.

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

Column addition and subtraction with 4-digit numbers

Complete the sentence. We can regroup 10 hundreds as 1 ___________

Where is regrouping needed in this column addition?

Which two numbers have been added to make the sum of 4,425?

Complete the sentence. We can regroup 10 ones as 1 __________

Regrouping is needed in the ones and tens. 

Where is regrouping needed in this column addition? 

Look at this column addition. Which two numbers add to equal the sum?

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