Happy Math Learning Factory
Total Knockout
Race to 100 in this knockout math adventure!
Players add, subtract, and deploy special power cards to reach exactly 100. Go over and you're knocked out — so every turn is a calculation and a decision. Fast to learn, endlessly replayable, and built on real math fluency practice.
Created by a math education specialist with 15 years' experience in public school classrooms.

How to play
Each player starts at zero and takes turns playing number cards to build toward 100. Add and subtract your way up the board — but if your total goes over 100, you're knocked out. The last player standing wins the round. Power cards introduce surprise and strategy that keep every game fresh.
- Easy to learn in one round — rules explained in minutes
- Plays 2–6 players (great for centers and family game night)
- Rounds last 15–30 minutes depending on player count
Power cards
Rocket Ship
Blast your total to a new number — big leaps, bold strategy.
Magic Mirror
Repeat the last card played. Double the effect, double the fun.
Wild Card
Choose your own move. Ultimate flexibility when you need it most.
Skills practiced
Addition
Adding values turn by turn toward the target
Subtraction
Strategic subtracting to avoid busting over 100
Number sense
Reading the board and anticipating opponents
Strategic thinking
Deciding when to use power cards for maximum effect
In the classroom
Ideal as a student-led math center. Rules are simple enough for students to run independently while you work with small groups. Reinforces addition and subtraction fluency through repeated, engaging play — no prep beyond setup.
Educator resources →At home
A perfect family game night pick. Everyone is in until they bust, so there are no early exits or hurt feelings — just laughter, close calls, and real math happening at the table.
See all games →