By: Ashley Margolis. What is an Abacus An abacus is one of the first counting devices It is used for addition, subtraction, multiplication and division.
Spreadsheets 2007/2010 version
Wes Bruce – PARCC Brandt Redd – Smarter Balanced Scott Elliot – ELPA 21 ASSETS – Carsten Wilmes Neal Kingston – DLM Chris Domaleski - NCSC Philip Olsen.
