Number Bases and Logarithms
A list of resources linking the use of a Soroban Abacus to feel for number through students working with number bases leading to a better understanding of logarithms at A level.
Links and Resources
The text book contains good exercises using binary arithmetic, adding, subtracting and multiplying binary numbers. There follows a further section exploring different number bases.
The activity sheet has nice actiities looking at binary codes and ASCII codes
Chapter 12 Painting By Numbers
page 84 of the book (p.85 of the pdf)
A nice exercise using modulo arithmetic to make coloured patterns. The activity leads on to investigating patterns made on Pascal's triangle when the triangle is formed using arithmetic to different moduli.
Teacher notes containing inspirational ideas as to how work with number bases and modular arithmetic can be incorporated into lessons.