Math Speed Trainer
Practice mental math speed drills online for free. Choose addition, subtraction, multiplication, division, percentages or decimals, pick a difficulty, and solve 4-choice questions with a built-in handwriting scratchpad.
Sharpen mental arithmetic with timed, four-choice speed drills. Pick the operation type, difficulty level, and question count, then solve each expression in your head while sketching the working out on a full-width handwriting scratchpad. Distractor options are generated to match your difficulty setting, so easy rounds are clearly distinguishable while hard rounds keep every option within a few units of the correct answer. All questions, scores, and mistake notes stay inside your browser.
How to use
- Select your desired calculation type, difficulty level, and question count.
- Click Start Speed Practice and calculate the answer mentally.
- Draft your work anytime on the scratchpad using a finger, stylus, or mouse.
- Select the correct choice from the 4 options (or press 1, 2, 3, 4).
Frequently asked questions
Are my practice scores or wrong questions uploaded to any server?
No. All calculations and mistake notes are stored 100% locally in your browser localStorage.
What does the difficulty level change?
It changes both the number ranges used in each expression and how close the wrong options sit to the correct answer: easy spreads them wide, while hard keeps distractors within roughly ±1 to ±3 so guessing rarely works.