Addition Worksheets: Adding 2-Digit Numbers (Sum Under 100)

Can your child add up two-digit numbers confidently? This worksheet is designed to give children ample practice on the addition of two-digit numbers. Learning the correct technique and rules of addition will help them understand the basics of mathematics better.

In this worksheet, the child is required to solve 25 double-digit addition problems. The problems are in a vertical format to make it easier to solve. You can download this free and printable worksheet.