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.

Use column addition to add numbers by regrouping tens

Maths

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.

Column addition

Match each tens numbers to the correct regrouping.  

What tens digit is missing from this column addition? 

Calculate the missing sum using column addition. 

What is the value of the digit 7 in this column addition?

What number is missing from this column addition?  

This lesson will soon be taken down.

Use column addition to add numbers by regrouping tens

Lesson outcome