數學練習 · 全新體驗
Inequalities
把Inequalities變成一場你真心想贏的對決。每一道題都是一次攻擊——比對手更快解出，就能命中對方。
4–99+ 歲皆宜 · 免下載 · 直接在瀏覽器中遊玩 · 23 種語言
玩法說明
Inequalities
選一名鬥士，挑選Inequalities，相信你的算術。解得越快、越準，出拳就越重——從輕鬆的低年級題目，一路挑戰到奧林匹亞等級。
An equation asks which number makes both sides equal. An inequality asks which numbers make one side SMALLER than the other — and usually there are infinitely many of them.
You solve it exactly like an equation: to get x on its own in 6x < 47, divide both sides by 6, giving x < 7.83…
So every number below 7.83 works — 7 works, 6 works, 0 works, −100 works. But there is a largest WHOLE number that works, and that is 7. Eight is already too big, because 6 × 8 = 48, which is past 47.
A good way to check: multiply your answer back by the coefficient and make sure it lands under the limit, then check that one more would overshoot.
One warning for later: if you ever divide an inequality by a NEGATIVE number, the sign flips direction. That does not happen here, but it is the rule that catches everyone.
Divide, then type the largest whole number that still fits.
— 快問快答 —
Inequalities：精簡 FAQ
- Inequalities可以免費玩嗎？
- 可以。Inequalities在瀏覽器裡就能免費暢玩——課程全部開放，免下載、免註冊。付費方案之後才解鎖完整鬥士陣容、全部舞台與進度保存。
- Inequalities適合誰玩？
- 4 到 99+ 歲的任何人。低年級對新手依然平緩，更高的難度則連有自信的玩家也得冒汗。
- 玩Inequalities需要下載什麼嗎？
- 不需要。Inequalities在任何瀏覽器裡都能跑，筆電、平板或手機都行。
- Inequalities能在課堂上用嗎？
- 當然可以。老師帶一整班玩Inequalities，還能追蹤誰在進步——按學生人數計價與教師儀表板，詳見學校方案。