Practice solving and balancing math equations with this customizable and printable worksheet. Each worksheet can contain up to 40 problems with any combination of addition and subtraction. Customize the types of problems using the checkboxes. Mixed problems contain both addition and subtraction. Select the number of problems and style of the header using the sliders. The problems are randomly generated, so you can create multiple worksheets without repeating the same problems. An answer sheet is included with each customized worksheet.