Arithmetic Tablet Pocket Question Artifact Children's Practice Math Board And Addition Calculation Mouth Subtraction New

Color:  A1
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1. Rotate the gear in one second to change the question, and it is easy to use, and the question is easy to rotate.
2. The upper gear changes the number in this area, and rotate the lower gear to change the number in this area.
3. Slide the paddle to switch operation symbols, double the number of questions \ operation symbols freely choose, nearly 10,000 permutations and combinations.
4. Paperless answering questions, saving paper and protecting the forest, parental counseling artifact, interesting teaching, let children fall in love with mathematics.
5. Practice once a day for three weeks to improve the child's verbal and mental arithmetic ability;  answer the test faster, save answering time, and achieve corner overtaking.

New and high quality
Product name: Arithmetic writing board
Category: calculation exercise supplies
material: plastic
Color: as shown in the figure
Size: 13.2 * 4.4cm
Package Included:1PC

Please refer to the measurement.  Tiny measuring error is allowable in normal range.
There might be a little color difference due to the monitor, camera or other factors, please refer to the physical item.