Mathematics teaching tool and arithmetic operations for children

Management training on numbers, from 1 to 100 for teaching mathematics, educational tool for teachers and elementary stage. Product features: Adjustable rotating design and can set 10 different waiting modes. Covers all additional and subtraction numbers from 1 to 100. Develops children's logical calculation ability. You can set up math questions quickly for your children at home. You can complete the test quickly by searching for math questions. Keeps children busy and calm when they need it. Small and wonderful, easy to carry, can add ink for reuse. Includes a digital educational stamp, an ink bottle, and a storage box. Quick details: Dimensions: 4.8 x 4.4 x 3 cm. Item weight: 70 g.