Addition and subtraction within 100

Learn to add and subtract two-digit numbers within 100.

Learn how to subtract two-digit numbers. By the end of this tutorial, you'll be able to solve problems like 48-9 and 48-31. More advanced problems like 48-29 will be covered in a future tutorial.

Learn how to solve problems like "___ - 37 = 48" where you don't know one of the values in an addition or subtraction equation.