The sum is the total when numbers are added together.

An equation shows that one number or calculation is equal to another.

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

Identify the addends and the sum in column addition

Maths

Use place value to correctly lay out column addition

Add 2-digit numbers using column addition

Add 3-digit numbers using column addition

Use column addition to solve problems

Use column addition to add numbers by regrouping ones

Use column addition to add numbers by regrouping tens

Use column addition with regrouping in ones and tens

Use known facts and strategies to accurately and efficiently calculate and check column addition

Use column addition with regrouping to solve problems

In this unit pupils will identify the addends and the sum in column addition. They will use their knowledge of place value to correctly lay out column addition. In the future unit pupils will identify the minuend and the subtrahend in column subtraction and explain the column subtraction algorithm. They will subtract from a 2-digit number using column subtraction with exchanging.

In the prior unit pupils accurately and efficiently solved multi-step addition and subtraction problems. They understood and explained how both addition and subtraction equations could be used to describe the same additive relationship. In this unit pupils will identify the addends and the sum in column addition. They will use their knowledge of place value to correctly lay out column addition.

In this unit pupils will identify the addends and the sum in column addition. They will use their knowledge of place value to correctly lay out column addition.

Column addition

The sum is the the total when numbers are added together.

Regroup means moving an amount to make a calculation easier.

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

Being efficient means finding a way to solve a problem quickly whilst also maintaining accuracy.

Estimation means to find a value that is close enough to the right answer, usually with some thought or calculation involved.

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Column addition

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