Find out what fills a room, but takes up no space, with this riddle and math combo worksheet. Use subtraction skills to solve the riddle on this math worksheet.

Subtract your way through these math problems, and you'll be pleasantly surprised with the answer to a tricky riddle.

What has to be broken before it can be used? Find out the answer to this riddle and more in this fun riddle and math combination worksheet.

Review two-digit subtraction the fun way, with this subtraction crossword!