Input Output Games Online
Free input output games online. No login required.
- 100% Free
- Works on phones and tablets
- Instant feedback
Play the Function Machine Game
A secret machine follows one math rule. Tap a test number, watch the output, then pick the rule that works every time.
Choose Your Input Output Game
Games for Kids
Pick a game for your child and get simple tips for practicing math at home.
Games for KidsLearn the Rule in 3 Steps
Look at the clue
Each pair shows a number that went in and the number that came out.
Test a number
Send in your own number. A second pair can rule out a tempting wrong answer.
Choose the rule
Pick the operation that works for every pair, not just the first one.
Function Machine FAQ
What is an input output game?
An input output game gives you a number that goes in and a number that comes out. Your job is to find the math rule that connects them, like add 4 or multiply by 3.
What grade level is this game for?
The easiest levels fit grades 2 and 3. Multiplication, division, and two-step rules fit grades 3 through 5. Players can pick the level that matches their skill.
Do students need an account to play?
No. Every game on this site is free and works without signing up, so students can start playing right away.
Can I use these games on a tablet or smartboard?
Yes. The games work on phones, tablets, laptops, and smartboards. The buttons are big enough for small hands.
How do input output tables work?
An input output table shows rows of inputs and outputs made by the same rule. Complete the missing numbers by finding the rule that fits every row.