Your goal is to fill in the blank spaces on the grid with the correct numbers. Click and drag the number tiles from the tray at the bottom into the empty boxes on the grid. Every number you drag onto has to make the equations correct in all directions.

When an equation is correct, its boxes turn green. If it's incorrect, the boxes turn red. Click a number on the grid to send it back to the tray.

If you get stuck, click the lightbulb for a hint. It lights up the right tile and the box where it goes. You can also use the Undo button to take back a move, or the Restart button to start the puzzle over.

There are four level packs to choose from:

• Addition
• Subtraction
• Multiplication
• Division

Can you solve every problem in every pack?

如何在手机上玩 Crossmath

要随时轻松玩 Crossmath, 您可以将其作为应用程序直接添加到您的手机中。这是一种无需担心丢失游戏保存数据的好方法。

对于 iOS 设备，只需点击 Safari 中的"共享"图标 ，然后选择"添加到主屏幕"。对于 Android 设备，点击"菜单"图标 并选择"安装应用程序"。