Smart Math Roller Stamp, Math Roller Stamp for Addition Subtraction Multiplication Division, Roller Stamp for Addition and Subtraction Practice

• 💡➕【Early Educational Math Exercise】This digital teaching stamp roller consists of multiplication, additions, subtraction and division exercises. Gently rolling, it can print math problems efficiently and quickly, which is convenient for assigning homework to children.
• 💡➖【Random Math Exercise】Random exercises can develop children's logical calculation ability and integral math abilities. The numbers are from 1-100, and the practice has addition, subtraction, multiplication or division.
• 💡✖【Clear Print】This digital teaching stamp roller comes with premium ink, which is suitable for most paper and is fade-resistant. Printing it on the back of discarded documents is suggested, as it saves paper and is eco-friendly.
• 💡➗【Reusable Teaching Stamp】The digital teaching stamp roller is easy to refill the ink, and a transparent storage box prevents ink from spilling. The ink can be filled with 5-8 drops on the side of the roller stamp when it runs out of ink, and wait a few minutes for the ink to absorb before continuing to use.
• 💡【Perfect Gift for Children】The digital teaching stamp roller is small and exquisite, which is to carry and put in a stationery box. It is a unique gift for children to improve their math and concentration skills.