Roller Digital Teaching Stamp, 1-100 Teaching Math Rolling Stamp Reusable Addition and Subtraction Teaching Stamp for Teachers Homeschool Primary SchoolNUMBER TEACHING STAMP Addition and Subtraction, Fun Drawings, numbers 1-100. A fun and meaningful gift for your child or your friend's childEFFICIENT AND FAST MATH QUESTIONS You can quickly prepare math questions for your kids at home. You can quickly complete the quiz simply by scrolling through the math questions.ROTATING ADJUSTABLE DESIGN 10 different queue modes can be adjusted. Satisfy all addition and subtraction numbers from 1-100. Develop children's logical calculation ability.REUSABLE Small and exquisite, easy to carry, can add ink for reuse. The imprint is clear, and it dries and does not fade after printing. Product includes digital teaching stamp, 1 bottle of ink.SAVE TIME You can quickly prepare math problems for your kids at home. You can print quickly by just scrolling through the math problems, and it dries quickly. Primary school students make one page a day to improve the speed and accuracy of oral arithmetic, cute and practical.Color: blue, pinkSize: stamp 44*30*48mm, imprint 20*4mmQuantity delivered: 2 pieces (without ink)