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3rd Grade Patterns & Function Machine Worksheets

Help 3rd graders master patterns and function machines with these printable worksheets. Students will determine function machine rules using addition and subtraction operations from 1 to 50. These exercises build critical thinking skills and prepare students for algebraic reasoning.

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numeric visual Multiple Choice tables addition subtraction

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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.

3rd Grade 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.