Math Planet Defense

Learn math (addition, subtraction, multiplication, division) from beginner to expert by playing a spaceship game. Features: * Learn math (addition, subtraction, multiplication, division) from beginner to expert. * Learn planets (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto) within our Solar System. * Select different spaceships with unique gun and laser. * Difficulty levels and scoring based on planets. * Unlock new planet after complete the score mission. * Top score is recorded with your name, and you can have rank after complete a mission. You can compete with your family to achieve the top scorer.