Digital Teaching Roller Pad - For additions, subtraction, arithmetic

Characteristics of the product:

1. Adjustable numbers, gentle scrolling, quick questions, no need to pay high prices for math questions.

2. Rotation and adjustment of column type, can adjust 10 different queue methods

3. Elementary school students make one page a day to improve the speed and accuracy of oral arithmetic, cute and practical.

4. The print is clear, dry and does not fade after printing. Add print oil, which can be used multiple times, is easy to use, and fun