WorksheetsOperations with Functions
Total questions: 15
Answer KeyOperations with Functions
Total questions: 15

15 questions
9th - 9th Grade
Mathematics
Operations with Functions is a free Grade 9 mathematics worksheet that gives students focused practice combining and evaluating algebraic functions. Across 15 questions, students simplify sums, differences, and products of linear and quadratic polynomial functions, then evaluate functions at positive and negative input values. The first 10 items are multiple-choice expressions, while the final 5 are fill-in-the-blank function evaluations. Use this worksheet to reinforce accurate polynomial operations, including combining like terms, applying the distributive property, managing signs, and substituting values into function rules. It works well after direct instruction or guided examples and can help you identify whether students need more support with symbolic manipulation or function evaluation. The worksheet is available as a free printable PDF and includes a complete answer key for efficient review and grading.
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Answer Key
This Grade 9 worksheet covers adding, subtracting, and multiplying polynomial functions, including linear and quadratic expressions, and evaluating functions at specified inputs. Its 10 multiple-choice questions require students to simplify function operations, while 5 fill-in-the-blank questions assess substitution and calculation for values such as g(3), r(4), f(-5), and m(-2).
Begin by modeling how to write each function operation clearly, combine like terms for sums and differences, and use the distributive property when multiplying. Work through one positive-input and one negative-input evaluation before students complete the five fill-in-the-blank items, then ask them to explain how they checked signs and constant terms in their answers.
Watch for students combining unlike terms, changing a constant incorrectly during addition or subtraction, or distributing only one term when multiplying two binomials. In the evaluation items, students may substitute a negative input incorrectly or skip squaring the input in the quadratic function g(x) or m(x).
You can assign this worksheet as a printable PDF or as a digital quiz on Wayground. It includes a complete answer key, and printable student work can be graded by scanning it with the Wayground for Teachers app. The printable format also offers an option for schools reducing screen time while keeping the same function-operation practice.
Use the worksheet’s Advanced Settings to adjust font spacing and font size so polynomial expressions, operation symbols, and fill-in-the-blank prompts are easier to read. You can also enable a dyslexia-friendly font or translate the worksheet into another language when helpful for students working with the function notation and algebraic directions.
Wayground offers a comprehensive collection of free printable worksheets and practice problems across all subjects. Teachers can browse downloadable PDFs with answer keys at https://wayground.com/en-us/worksheets to find additional resources for essential skills and concepts.