Adding 2-digit numbers

When you are adding larger numbers, it’s often better to use a written method.

Column addition is a good written method to add one number to another.

It involves putting the digits of each number into columns according to their place value.

You then add the digits, starting from the ones column on the right-hand side.

Complete this interactive activity to learn more about adding numbers using column addition and then put your knowledge to the test with a quiz.

When adding larger numbers together you can use column addition.

First you line the numbers up in the correct ones and tens columns.

Then start by adding the ones. If the ones add up to a total of more than 10, you can move these groups of 10 over to the tens column.

Then, add up how many groups of 10 you have.

Let's look at how you can use column addition to solve 17 + 24.