Number decomposition box with 20 balls | Splitbox shaker box sets learn math

GAME MATERIAL Number decomposition box (12.5 x 7.5 x 1.5 cm) with three separable chambers and 20 red balls made of RE-Plastic®. GAME CONTENT / SPONSORED COMPETENCE 1. Clear decomposition of numbers within the 10 or 20 number range 2. Visual representation of addition and subtraction problems and setting up simple equations 3. Calculate hidden spheres by covering chambers 4. Decomposition into two summands by closing the left ventricle. 5. Decomposition into three summands by opening the left chamber lid 6. Self-control (highly prompting) by opening and closing the two covers.