Here we have prepared subtraction equation cards I created for my Lower Elementary Montessori classroom. This set includes static two digit, three digit and for digit subtraction problems. There are eight of each card, a total of 24 prepared equations. Answer Keys are included. Being a Montessori teacher the cards are color coded; ones are green, tens blue, hundreds red, and thousands green. My students use these while working with the checker board, golden beads, stamp game and bead frames. Simply print the file, I always laminate to keep looking nice, and cut on the dotted line. I hope you enjoy this file.