The missing number multiplication worksheet maker creates horizontal format multiplication worksheets that are missing either the multiplicand or multiplier. You can customize the number of problems, multiplier and multiplicand length, and header style. This worksheet is great for introducing a child to algebra. Each worksheet can contain between 1 and 30 problems each. The multiplicand and multiplier can be customized to contain between 1 and 3 digits each. Click the green button to create a custom document, with an answer sheet, that you can print.