【實用遊戲app】SumerApp|最夯免費app-綠色工廠好玩App

Sumer is a fun and easy math game for all ages. You can practice addition skills while playing. Pick the correct answer to win the points and try to break your best record. And remember, the clock is ticking- Learn numbers- Practice math skills- Random positive and negative numbers- Break the record- Easy to use- It is free