All four operations — + − × ÷ — shuffle randomly every question. The ultimate mental arithmetic workout. You never know what's coming next.
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 choose which operations to include, time per question, and question count.
Hit ▶ Start Game. Each question picks a random operation from your enabled set.
Read the question carefully — the operation changes every time — then tap or press 1 2 3 4.
Answer quickly to earn a speed bonus on top of the base 10 points.
Review missed questions after each game and repeat until you hit a perfect score.
Frequently Asked Questions
Why is Mixed Dash harder than the single-operation games?
You have to mentally switch strategy every question — addition, then division, then subtraction. That context-switching is its own cognitive challenge and better mirrors real-world arithmetic.
Can I disable division to warm up?
Yes. Open Settings and uncheck the ÷ toggle. You can mix any combination of the four operations. The "No Division" preset does this for you.
Are division answers always whole numbers?
Yes. Division problems are generated as quotient × divisor = dividend, so the answer is always an integer and you never need to deal with remainders.
What number ranges does each operation use?
Addition and subtraction use 1–20. Multiplication uses factors 1–12. Division uses divisors 2–12 with dividends up to 144. These match standard school ranges and can be adjusted in Settings.
How is the high score stored?
Scores are saved in your browser's localStorage and persist between visits on the same device and browser profile.
Did you know?
Mental arithmetic world champions can solve a mix of all four operations on large numbers faster than most people can type the problem into a calculator.
Research in cognitive psychology shows that switching between arithmetic operations activates the brain's executive-control network — the same one used for complex decision-making.
The abacus, invented around 2,700 BC, handles all four operations with equal speed — still used in mental-math competitions to this day in East Asia.