This is a funny puzzle game and the game rule is very simple:
move one or two stick(s) to make the equation true.
but the digit must be complete at every move step.
The operation is also simple:
1. firstly click the stick you want to move away, the selected stick will be in shaking state.
2. then click the position where you want to insert the selected stick.
( the stick in operator also can be moved, eg: ‘+’ -> ‘-’ )
there are countless questions in practice library.
hope this puzzle game can fresh your brain, especially for children.