Race through addition facts before the clock runs out. Pick the right answer fast to earn a speed bonus on every correct response.
Try:
Use keys 1 2 3 4 or tap · +10 correct · −5 wrong · speed bonus ⚡
Q 1
10
7 + 8 = ?
You've got this! 💪
🎉
Well done!
Here's how you did:
Final Score
0
High Score
0
Correct
0
Avg Bonus
0
❌ Questions you missed
How to use
Click ⚙ Settings to set your number range, time limit, and question count.
Hit ▶ Start Game to begin the timed drill.
Read the addition question and tap the correct answer — or press keys 1 2 3 4.
Answer quickly to earn a speed bonus (up to 1 extra point per second remaining).
After the game, review any missed questions and try to beat your high score.
Frequently Asked Questions
How does the speed bonus work?
You earn 1 bonus point per second remaining when you answer correctly. Answer in 2 seconds on a 10-second timer and get up to 8 bonus points on top of the base 10.
Can I use this with young children?
Absolutely. Set the range to 1–10 and the timer to 15+ seconds. The multiple-choice format keeps frustration low while building recall speed over time.
Where is my high score stored?
Scores are saved in your browser's localStorage — they persist between visits but are private to your device and browser profile.
What happens when time runs out?
The question is marked wrong, 5 points are deducted, the correct answer is highlighted, and the next question loads after a short delay.
What is the maximum score per question?
10 base points plus up to (timer − 1) bonus points. On a 10-second timer the maximum per question is 19 points (answer instantly).
Did you know?
Speed recall of addition facts is called "math fluency" — experts say it frees working memory for tackling harder problems.
The fastest mental-math competitors can add two single-digit numbers in under 200 milliseconds — about the time it takes to blink.
Research shows that timed addition drills improve recall speed by 30–40% over six weeks for primary-school children.