Mathematics and Mental Calculation

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Topic / Topic starter Replies Last postsort ascending
More division tricks. Numbers ending in 1 or 2
by Kinma » 5 October, 2017 - 06:18
4
by Kinma
16 October, 2017 - 07:52
Fast division by 23
by Kinma » 15 October, 2017 - 00:57
2
by greymatters
15 October, 2017 - 08:41
does the abacus have a real advantage ?
by thunderspeed » 4 June, 2016 - 04:17
7
by thunderspeed
13 October, 2017 - 22:54
What Mental Calculation method should I choose?
by Ywan » 12 October, 2017 - 23:01
4
by Kinma
13 October, 2017 - 04:12
Mental Calculation - Division - Resources?
by RobertFontaine » 2 March, 2016 - 05:45
26
by Kinma
13 October, 2017 - 00:36
Very quick division trick for numbers ending in 9 or 8
by Kinma » 2 October, 2017 - 05:26
1
by Tiger
3 October, 2017 - 21:42
Flash anzan and techniques
by thunderspeed » 30 September, 2017 - 21:57
1
by Kinma
2 October, 2017 - 02:44
Help choosing a system for mental math
by RubiksKid » 4 August, 2017 - 15:45
21
by RubiksKid
28 September, 2017 - 13:05
Creative ways of multiplying differently
by Kinma » 28 September, 2017 - 06:53
0
by Kinma
28 September, 2017 - 06:53
Best association system for numbers 0 - 999?
by RubiksKid » 24 September, 2017 - 20:41
6
by RubiksKid
27 September, 2017 - 12:21
Memorizing squares up to 999?
by RubiksKid » 24 September, 2017 - 15:49
5
by RubiksKid
27 September, 2017 - 12:05
Organizing and implementing mental calculation mnmonics
by thunderspeed » 26 September, 2017 - 23:35
3
by Kinma
27 September, 2017 - 07:15
Calculating logarithms by hand
by Kinma » 8 September, 2017 - 07:05
3
by Kinma
27 September, 2017 - 05:14
Which is greater? a^b or b^a?
by greymatters » 24 September, 2017 - 08:34
1
by DLyons
26 September, 2017 - 20:05
Duplex method for square roots
by Kinma » 25 September, 2017 - 14:53
2
by RubiksKid
26 September, 2017 - 12:00
Duplex method for squaring numbers very quickly
by Kinma » 24 August, 2017 - 11:19
6
by Kinma
25 September, 2017 - 12:41
Best books on Math prodigies and Speed Math
by Mnemon » 21 September, 2017 - 15:33
5
by greymatters
23 September, 2017 - 21:45
Paper on calendar calculations – determine the year’s share for the day-of-week
by TorstenBerg » 19 September, 2017 - 23:51
1
by greymatters
22 September, 2017 - 11:06
Chinese short division
by TorstenBerg » 30 August, 2017 - 08:05
8
by Kinma
13 September, 2017 - 02:57
Division with 2 digits simultaneously!
by Kinma » 4 September, 2014 - 06:37
11
by Tiger
8 September, 2017 - 01:07
Three digit division
by Kinma » 30 August, 2017 - 01:31
1
by Tiger
30 August, 2017 - 19:25
Soroban and flash anzan
by Kinma » 25 August, 2017 - 03:41
7
by TorstenBerg
30 August, 2017 - 07:55
Speed division
by Tiger » 25 August, 2017 - 18:23
2
by Tiger
27 August, 2017 - 18:49
Granth Thakkar's world record for 20 digit multiplication
by Kinma » 16 August, 2017 - 03:32
6
by RubiksKid
25 August, 2017 - 13:33
DO YOU WANT TO LEARN SOROBAN AND FLASH ANZAN? CLICK HERE FOR CLASSES ONLINE WITH RECORD HOLDER IN MEMORIAD: JEONGHE LEE!!!!!!!!!
by Adrián García » 25 June, 2017 - 14:50
7
by Kinma
25 August, 2017 - 02:33
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