Adding and subtracting
What is column addition?
Learn how column addition can be used to make adding numbers easier.
10 more and 10 less
Learn on how to find 10 more and 10 less of a given 2-digit number.
Add and subtract 2-digit and 1-digit numbers
Learn about adding and subtracting numbers with 2 digits and 1 digit.
Number bonds to 100
Learn about number bonds to 100 using tens and ones.
Subtraction to 20
Discover how to subtract within 20.
Adding three one-digit numbers together
Learn how to add three one-digit numbers.
Add two-digit numbers
Learn how to add two-digit numbers.
Add by making 10
Learn about bridging through ten, which can be a useful strategy when solving addition problems.
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.
