Mac’s Abacus Posters
Posters at back of Mac’s Abacus Basic workbook
First Counts Poster (back cover)
- Relates numerical counts with equivalent Fingers, Objects and Abacus Beads.
Subtracting Poster (inside back cover)
- Demonstrates the concept of Subtracting, starting with 6 colored Stars
- At each Subtraction (row) one Star is removed from the right side.
- The removal of the last Star (bottom row) is a good way to present the Concept of Zero.