Adding and subtracting
What is column addition?
Learn how column addition can be used to make adding numbers easier.
Addition and subtraction methods
Learn about efficient addition and subtraction methods.
Add 3-digit and 2-digit numbers
Learn how to add 3-digit and 2-digit numbers using the column method.
Adding 3-digit and 1-digit numbers together
Explore examples and a video to show how to add up to 3-digits and 1-digit numbers.
Subtract a 1-digit number from a 3-digit number
Learn some different methods for subtracting a one-digit number from a three-digit number.
How to use column subtraction
Find out how number columns allow you to take large numbers and subtract one from another.
How to add and subtract in your head
Explore how to use mental methods for addition and subtraction.
