Math plus and minus training, Suitable for all ages, Play anywhere and any time.

Features
• Covering elementary level lessons
• Can play plus, minus, And can play plus and minus at the same time
• You can choose difficulty levels
◦ Easy: has 3 choices to choose for the answer
◦ Normal: the player needs to type their own answers
• You can customize game rule
◦ You can select the minimum and maximum numbers
◦ Choose to finish the game immediately when the player answers incorrectly
◦ You can choose the total question to played
◦ You can set the game time in each round
◦ You can play an endless game
• You can check the answer after the game end, To check how you make mistakes
• There are various statistics collected. Can view and check your stats at any time
• You can change the input type to "Left to Right" or "Right to Left"
• Has Carry and Borrow number systems