Addition and subtraction

In this topic, we will add and subtract whole numbers. The topic starts with 1+1=2 and goes through adding and subtracting within 1000. We will cover regrouping, borrowing, and word problems.
14 exercises available

Adding and subtracting is the basis of all mathematics. This tutorial introduces you to one-digit addition and subtraction.

Add and subtract numbers 20 or less. Find the missing number in addition and subtraction equations.

Learn how to add numbers like 259 + 363. These addition problems are a harder than the ones we've done before because they require regrouping (also called carrying).