Features: This writable and erasable math manipulatives practice card set visually simplifies addition and subtraction concepts through color coded cardstock, transforming abstract mathematics into concrete understanding for learners. Crafted with paper and featuring portable size design, these classroom teaching aid eliminates complex setups while ensuring safe handling for children during math practice. Ideal for preschooler, students, homeschooling parent, and educators seeks interactive math teaching flashcards that aligns for hands on numerical operations training. Perfect for classroom instruction, homework reinforcement, or travel learning – these compact visual aid adapt seamlessly to desks, study rooms, and backpacks. Interactive double sided addition and subtraction operations study cards promote active engagement through physical sliding calculations, bridging theoretical math concepts with practical problem solving skills development. Specifications: Component: Paper Color: As Picture Shown Size: Approx. 26.7x8.8cm/10.5x3.46in Weight: Approx. 120g Package Includes: 16Pieces Addition Subtraction Operations Flashcards 2Pieces Erasable Marker Pens note: 1.Please allow 0-1cm error due to manual measurement. Be sure you donot mind before bid. 2.Due to difference between different monitors, the picture may not reflect the actual color