Overview of the Games:
StarSum is a game to practice addition and subtraction of 2 digits. It contains 4 expressions. Each expression has 3 operands and 2 operators.
The goal of this game is to swap the operands to make the top 2 expressions have the same results and the bottom 2 expressions have the same results.
The player could choose to practice plus only or the combination of plus and minus.
It supports 5 levels.
Level 1: the player needs to swap 4 operands.
Level 2: the player needs to swap 5 operands.
Level 3: the player needs to swap 6 operands.
Level 4: the player needs to swap 7 operands.
Level 5: the player needs to swap 8 operands.
The Player could press the Config button in the lower left corner to configure the operators and to bring up the level window.
The player could choose the number of operands to swap from the Level window.
The player needs to pick up the first operand to swap. The selected number is highlighted. In Figure 1, the player picks up the number 14.
The player picks the 12 to swap with 14. Figure 2 shows the results after 14 and 12 are swapped.
The player could view the solution by pressing the Solution button in the Help (?) window.