One Step Equation: Addition and Subtraction - Math Worksheets 4 Kids One-Step Equation: Addition and Subtraction Worksheets One-step equation worksheets have exclusive pages to solve the equations involving fractions, integers, and decimals. Students of grade 6, grade 7, and grade 8 are required to perform the addition and subtraction operation to solve the equations in just one-step. There are some free pdfs too!