Montessori Preschool: Subtraction with the Stamp Game
Age 4

A 4 1/2-year-old preschooler used a Montessori material called the Stamp Game to figure out these subtraction problems. Notice that they involve “borrowing” from the next category. Work of this kind presupposes a strong grasp of place value, which our Montessori preschool students gain through extensive practice with hands-on bead materials.