MATH MISSION
Math mission, harder each level.
A level-based mental-math challenge: level up on correct answers, lose a life on wrong ones. Great for drill.
1 + 9 = ?
Everything runs locally in your browser
What is this?
Answer enough correctly to advance; higher levels use bigger numbers and more operations. A wrong answer costs a life; three lives ends the game.
示例与注意事项Example & notes
一个例子A worked example
选「二年级 · 加减法」连过 5 关：页面给出正确率与错题类型分布，方便知道该补哪一类。Pick "grade 2 · addition and subtraction" and clear five levels: you get accuracy plus a breakdown of mistake types so you know what to drill.
注意事项Things to watch
- 错题按知识点归类，比只看总分有用得多。Mistakes are grouped by skill, which beats looking at a total score alone.
- 进度保存在本地浏览器，换设备或清理站点数据后就看不到了。Progress lives in your browser; another device or cleared site data starts fresh.
- 难度会随正确率自动升降，连错会降档，避免卡死失去兴趣。Difficulty adapts to accuracy and eases off after a losing streak so kids do not stall.
相关问答More Q&A
适合几年级？Which grades does it suit?
覆盖一到六年级常见计算与简单应用题，按年级选难度即可。Grades 1–6 cover the usual arithmetic and simple word problems; pick the grade to set difficulty.
有历史成绩记录吗？Are past results kept?
保留最近成绩与关卡进度，可在页面上直接查看。Recent scores and level progress are kept and visible on the page.