Multifunctional mathematics learning tool featuring addition and subtraction ruler made from ABS , designed to make math fun for preschoolers while teaching color recognition and basic mathematics concepts in kindergarten classrooms. Educational mathematical operations ruler combines measurement markings with number scales, serving as both straightedge and math teaching aid for first grade classroom exercises and homework assistance. Compact size 280x43mm fit standard pencil cases with protective packaging bag, featuring flat design that prevents loss and damage while making it perfect as classroom rewards or after school program incentives. safe construction with rounded polished edges and light weight 55g design accommodates , eliminating injury risks during group activities in early education centers. Package includes: 1Piece Multifunctional Addition and Subtraction Ruler