Brand: General

Features:

• Easy to use
• Made from high-quality materials
• Highly effective
• Easy to store

Details:
Educational ruler for kids, designed to teach numbers and basic math operations (addition and subtraction) quickly and accurately from 0 to 20.

• Helps children learn addition and subtraction easily.
• Move the ruler to select a number in the box and observe the summed numbers in the middle.
• Identify the number above and below on the right to master addition and subtraction from 0 to 20.
• Example for addition: The first row of the ruler includes the number 11, helping with addition like 1+13=14, 12+2=14, 11+3=14, and so on.
• Example for subtraction: 13-12=1, 13-11=2, 13-10=3, and so on.