7th grade pre algebra subtraction 3 Scientist quiz game - Pre algebra subtraction 3 with Scientist quiz game - this game is for seventh grade students who want to take their algebra subtraction skills to the next step. Here they will be able to practice their skills, and polish them till they have mastered them. This game is a scientists quiz, so once students have polished their skills enough, they can use this game is a test; to ensure they are on the top of their game. In this online game students will be required to solve the equation and identify the missing variable. Each problem will appear with four options, and students will be required to pick the correct answer to gain points and move forward. This is a fun and easy way to teach 7th graders math skills.