5th grade algebra problems with decimals Spin the wheel game - Learn how to solve algebra problems that contain decimals. In this math game online, students will solve and find the missing values of variables in a linear equation. For example, students are asked to solve and find the value �x� in an equation like the following: 3 + x = 9. The principle entails making �x� the subject of the formula in such an equation. In addition to the algebra skills needed in this activity, students also need to understand how to add or subtract decimals. This activity is an interactive online math game. This can make a math class much fun or homeschooling kids a more exciting exercise. Have fun studying decimals and please share. The game is for 4th, 5th and 6th graders.