Outer Space Coloring Pages (Color-by-Code) with Answer Box. This resource contains 18 Math Coloring Worksheets (3 sets of 6 coloring sheets). You can give a different version for each student. All pictures have a colored answer key. Here's how it works: solve a math problem, match the answer to a letter in the answer box, and use that letter to color the picture. It's a super fun way to learn math while being creative! Please leave your feedback on this resource to earn credit points to save