Mostly Games To Improve Computation and Number Sense
Practice for Rapid Computation
Multiplying 2 through 9
Subtraction Practice with Points
Single digit and double digit problems to master before multi-digit
Borrowing and 100-pairs
Multi-digit subtraction with borrowing
Older Misc. Pages
A stand-alone problem
Old Javascript Version -- Subtraction Practice with Points
Adding Practice with Points
Structure of Numbers
The Building Blocks of Arithmetic
Game with Prime Buttons.
Experimental Color-mixing Version
Computing the GCF in Different Ways
Greatest Common Factor with Prime Buttons
Find the GCF the Ancient Greek Way