mental math game
A free math game — play it in your browser, no install. A small browser game for practising addition and subtraction with negative numbers in 20-question rounds.
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Open the live demo Source on GitHubFrom the README
A small browser game for practising addition and subtraction with negative numbers.
Twenty questions, immediate feedback, a review of every answer, and a reason to try again.
Play in your browser · Download the offline copy
Actual browser screenshots from demonstration rounds. Click an image for the full-size view.
One of my students was getting mixed up when adding and subtracting negative numbers. For example, −5 + 4 could become −9, when the answer should be −1. I wanted to give them a simple way to practise these calculations in their browser.
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