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2 Teaching Stamp - Addition and Subtraction Teaching Stamps for Kids, Roller Design Digital Teaching Stamp, Math Stamps Practice Tools Within 100 Supplies Educational Toy for Preschool Home School Supplies - pack of 2 Practice Stamps For Math Problems: Addition & Subtraction stamp, 2 bottles of ink • Interesting School Supplies:The teaching stamp set as fun as toys, makes learning fun and exciting, increase children's interest in learning ! suitable for students to practice, parent guidance, teacher teaching Good quality product. made with good quality material.It comes in various range & variety and hence fulfills the need of all. Quick Addition and Subtraction You can quickly prepare math problems for your kids at home, just roll the stamp, you can quickly print math problems, and it dries quickly, convenient and practical. Arrangement needs to be changed every 10 math problems to avoid duplication Excellent Mathematics Skill Development Rotate and adjust the column, and 10 different queuing methods can be adjusted. Satisfy all addition and subtraction numbers from 1-100, and cultivate children's logical calculation ability.120pcs