With the special marker, you WRITE the correct answer, without being "afraid" of the MISTAKE!

With the brush included in the cap of the marker, you ERASE what you wrote. You WRITE AGAIN and PRACTICE many times, to become the BEST!

With the book on ADDITION and SUBTRACTION, our little friends – especially first graders – UNDERSTAND, LEARN, and PRACTICE:

In Addition

• Using images and symbols – The complement
• With the method of exceeding the decade – Based on the five
• Two-digit number with one-digit – Two-digit number with two-digit (10, 20, ...)

In Subtraction

• With small and large subtractands – The complement
• With the method of exceeding the decade – With addition upwards
• One-digit number from two-digit – Two-digit number (10, 20, ...) from two-digit

Additionally

• They learn numbers up to 100
• They compare numbers – The double – The half
• They recognize the units and tens of a number