About the Mental Calculation, Mathematics, and Puzzles category

1

October 27, 2018

Memoriad mental addition of ten 10digit numbers

2

January 18, 2020

``Left to Right`` or ``CrossMultiplication``. Which one is better?

11

January 18, 2020

Is Anyone Using Kaktovik Iñupiaq Numerals to Speed up Their Math?

28

January 18, 2020

Cross multiplication: How to multiply 3+ digit numbers?

17

January 17, 2020

9th Mental Calculation World Cup 2020

1

January 17, 2020

Help me to memorize (stock) numbers composed by more than 5 digits

9

January 8, 2020

9307 × 7992 by Soroban?

5

January 8, 2020

Alphabetical puzzle

4

December 30, 2019

A very easy mentally way to calculate logarithm

1

December 2, 2019

How to solve this Soroban addition?

7

December 17, 2019

What are your books about mental calculation?

3

December 14, 2019

Rinne Tsujikubo. 13 years old Japanese girl

9

December 14, 2019

De kunst van het hoofdrekenen (Art of Mental Calculation)

5

December 5, 2019

An alternative way to mentally calculate LOGARITHMS and ANTILOGARITHMS

1

December 3, 2019

Mentally calculating trigonometric values

1

December 2, 2019

Calculating squares and higher powers using division and addition

12

November 30, 2019

Visualizing a chess board

15

November 27, 2019

A completely different approach to calculating ln(2)

4

November 22, 2019

Calculating ln Natural Logarithms

3

November 16, 2019

Binary numbers techniques

18

November 15, 2019

Check out "Math  Quiz Game"

10

November 14, 2019

Multiply two squaring numbers

14

November 11, 2019

Squaring shortcut method

15

November 8, 2019

More repetition fun in division

6

November 8, 2019

Multiply into double no

4

November 8, 2019

Some special case in multiplication

6

November 6, 2019

How to calculate square root of complex no in mind

5

November 6, 2019

Fast division by 23

9

November 6, 2019

**Conjugate of complex no**

1

November 6, 2019
