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1st Grade Variable Worksheets

This page features free printable 1st grade variable worksheets focused on addition and subtraction within 20. Students will practice finding the value of unknown variables in math equations, developing essential algebraic thinking skills through 20 problems per worksheet.

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Addition & Subtraction

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About these worksheets

Students solve for unknown variables in addition and subtraction equations at four levels of difficulty: within 10, within 20, within 100, and within 1,000. These worksheets build early algebraic thinking by having students find the missing number that makes each equation true. Aligned with kindergarten through third grade standards.