The rule of nine, simplified and expanded
An edition of The rule of nine, simplified and expanded (1959)
an easy, speedy way to check addition, subtraction, multiplication, and division.
By Wallace, William Jr.
Publish Date
1959
Publisher
U.S. Naval Institute
Language
eng
Pages
27
1-1 of 1 Editions
The rule of nine, simplified and expanded
Language: eng
Pages: 27
Published In: 1959
Publisher: U.S. Naval Institute