Input/Output Tables & Function Machine Worksheet Generator

Print free rule-based worksheets for ages 7–11. Kids use a rule like + 5, × 3 or “× 2, then + 1” to fill in In/Out tables, work backward to the missing input, find the rule from a finished table, run numbers through drawn function machines, or extend number patterns. Choose the rules, the number range (to 20, 100 or 1,000), table rows and problems per page, and print with an answer key.

Worksheet typeRulesNumber rangeRows per tableProblems on the pageInclude an answer key on a second page

2nd graders start with add & subtract tables to 20; 3rd and 4th graders find multiply & divide rules to 100; two-step machines to 1,000 stretch 5th graders. With multiply & divide, number patterns double, triple or halve; with two-step rules they grow by a bit more each time or zigzag.

Go to print queue →6 problems

Input/Output Tables

Use the rule to fill in each Out number.

Rule− 2

InOut5899653256

Rule− 17

InOut37100503988

Rule+ 4

InOut7962313014

Rule− 14

InOut5344733467

Rule+ 25

InOut6675174850

Rule− 25

InOut8857446486

Answer KeyInput/Output Tables

Rule− 2

InOut58569997656332305654

Rule− 17

InOut372010083503339228871

Rule+ 4

InOut79836266313530341418

Rule− 14

InOut53394430735934206753

Rule+ 25

InOut669175100174248735075

Rule− 25

InOut88635732441964398661