# Addition and subtraction

Contents

First, we will learn how addition and subtraction relate. Next, we will add and subtract numbers less than or equal to 20 and solve addition and subtraction word problems. Finally, we will begin adding 2-digit numbers.

15 exercises available

Learn how to addition and subtraction are related. Numbers used are 10 or less.

Learn to add. Numbers used are 20 or less.

Learn to subtract. Numbers used are 20 or less.

Learn how to solve problems like "___ + 7 = 18" where you don't know one of the values in an addition or subtraction equation.

Learn how to solve addition and subtraction word problems. Numbers used are 20 or less.

Learn how to solve word problems that use the words "more" and "fewer". Numbers used are 20 or less.

Learn how to solve addition problems like 23+4 and 23+40.

Learn how to add two-digit numbers. By the end of this tutorial, you'll be able to solve problems like 48+6 and 48+21. More advanced problems like 48+28 will be covered in a future tutorial.