Mental Calculation, Mathematics, and Puzzles


Topic Replies Activity
About the Mental Calculation, Mathematics, and Puzzles category 1 October 27, 2018
Multiplication table (99x99) 6 October 18, 2019
Multiplication a more efficient algorithm 1 October 17, 2019
Three digit division 4 October 17, 2019
How to calculate squares quickly 8 October 17, 2019
Divisibility and simple osculators 4 October 16, 2019
Division Mentally 6 October 15, 2019
Mental Multiplication: Useful Facts and Exercises 5 October 12, 2019
Expert mathematicians stumped by simple subtractions 6 October 11, 2019
How to calculate future cricket score 2 October 8, 2019
Is abacus speed calculation really useful or just a gimmick? 10 October 7, 2019
Mental Calculation - Basics ( Complements ) 8 October 7, 2019
Prime numbers... useful applications? 8 October 6, 2019
Left to Right method for large numbers | Carrying problem 9 October 5, 2019
Avoiding the carry 8 October 2, 2019
Calculating Logarithms on a Soroban 2 October 2, 2019
Soroban Finger Exercises 4 October 1, 2019
Mental Abacus 10 September 30, 2019
Soroban #4 1 September 28, 2019
Reading Newton's Principia Mathematica by candlelight 1 September 28, 2019
Tips for competing in mental calculation competitions 1 September 27, 2019
Logarithms explained Bob Ross style 1 September 27, 2019
How large a subtotal (digits) do you maintain without mnemonics? 7 September 25, 2019
Do you want to learn soroban and flash anzan? Click here for classes online with record holder in memoriad: Jeonghe Lee! 14 September 24, 2019
Help choosing a system for mental math 31 September 20, 2019
Some questions about Soroban 3 September 18, 2019
Mathemagician course 10 September 17, 2019
Double digit squares... useful applications? 4 September 16, 2019
Mental math 15 September 14, 2019
Introduction to Higher Mathematics 3 September 14, 2019