Addition speed test

How fast can you add in your head? Take a timed run and find out — then use the methods below to beat it.

The test

R3CK0N's addition drill gives you two random numbers at a time. Type the sum and press Enter; the next appears immediately. Choose a timer (15 to 120 seconds) or a fixed number of problems (10 to 100).

Your score is PPM — correct answers per minute — alongside your accuracy and a per-problem timing chart.

Add left to right

On paper you add from the right because you write the answer from the right. In your head that's backwards: you have to hold every carried digit until the end. Start with the largest place value instead and keep one running total.

Round, add, then correct

When a number is just below a round one, add the round number and take the difference back off.

Look for pairs that make ten

With several numbers, group the ones that complete each other: 7 + 3, 6 + 4, 8 + 2. With 57 + 68, 7 + 8 = 15 carries 1 into 5 + 6 = 11, giving 125 — but spotting 57 + 3 = 60, then 60 + 65 = 125 is often faster.

Train it

Addition is the foundation for every other operation — even multiplication is mostly adding partial products. One minute a day on Medium is a good routine; move to Hard once your accuracy stays high.

Frequently asked questions

Is it free?

Yes — no ads, no paywall, and no account needed. Results stay in your browser unless you sign in to sync them.

Can I track my progress?

Every run is saved, and the Stats tab charts your speed and accuracy over time for each operation and difficulty.