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aka Henry Smith from USA (77 years). Wizzley author for 9 years.   100%  

Hi, I am a mathematician and a physicist, and I write a significant amount of work for the internet. I write about coins extensively, and I write about party supplies. Other topics sometimes become my focus. As an Amazon Associate I earn from qualifying purchases. Also, other associates accounts and ads provide earnings.

Helping Children with Arithmetic: The Early Grades
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