➕ Addition Exercise (Mental)
Mental addition exercise: a number appears on the screen and a random number to be added below it; write the total and press OK — if correct, the total is moved to the top and a new number appears. The chain continues until you stop it. You can choose the added number range (10-29, 10-99, 10-499, 10-999) and the time per question (unlimited or 5-300 sec, with countdown); if the time expires, the correct answer is shown and you move on to the next number.
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Frequently Asked Questions
How to improve mental addition?
Regular short practice is the most effective way: 5-10 minutes a day, first gain speed without errors in a small range (10-29), then increase the range and add a time limit.
What happens if I give a wrong answer?
The correct answer is shown and the chain continues from that value — the flow is not broken, the number of wrong answers in your score increases.