【實用教育app】StarSum|最夯免費app-綠色工廠好玩App

StarSum is a game to practice addition and subtraction of 2 digits. It contains 4 expressions. Each expression has 3 operands and 2 operators.There are 4 circles along the right side. These circles show the results of these 4 expressions.1. The top 2 circles show the results for the top pair of 2 expressions. 2. The bottom 2 circles show the results for the bottom pair of 2 expressions.3. 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.4. The player could choose to practice plus only or the combination of plus and minus.5. 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.