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addition Patterns & Function Machine Worksheets

These addition patterns and function machine worksheets help students identify rules and complete sequences using addition operations. Students practice determining function machine rules, finding missing numbers in patterns, and creating their own addition-based sequences to strengthen algebraic thinking skills.

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3rd Grade Remove Filter

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numeric visual Multiple Choice tables addition subtraction Remove Filter

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Function Machines

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About these worksheets

Function machine worksheets develop input-output reasoning skills. Students figure out the rule a function machine uses — whether addition, subtraction, multiplication, division, or a two-step operation — by analyzing input-output pairs, then apply the rule to find missing values. Resources span third through sixth grade.

addition Patterns & Function Machine Worksheets - Determining Function Machine Rule (+ or -) (MC) worksheet

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Determining Function Machine Rule (+ or -) (MC)

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Figure out what number is being added or subtracted to turn each input into the output.
Use a few input-output examples to spot a consistent pattern and name the rule.
Check that the same rule works for every pair in the table before choosing an answer.
Tell the difference between an “add” rule and a “subtract” rule by comparing inputs and outputs.