Mathematics and Mental Calculation

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History of Mental/Oral Proofs - Mental Mathematics ?
by RobertFontaine » 8 July, 2015 - 17:45
7
by RobertFontaine
11 July, 2015 - 16:06
Wife has decided I am a wingnut
by RobertFontaine » 4 July, 2015 - 06:01
4
by RobertFontaine
5 July, 2015 - 21:11
Mental Abacus
by A.Shadow » 17 September, 2014 - 12:19
8
by The-Memoriser.
30 June, 2015 - 19:54
Test equation editor
by RobertFontaine » 21 June, 2015 - 19:44
9
by The-Memoriser.
29 June, 2015 - 07:16
Annoying 9
by RobertFontaine » 16 June, 2015 - 10:03
20
by Kinma
26 June, 2015 - 09:13
Multiplication by 9
by RobertFontaine » 23 June, 2015 - 20:58
2
by Nodas
25 June, 2015 - 06:44
Remembering Logs...
by RobertFontaine » 18 June, 2015 - 12:31
2
by RobertFontaine
23 June, 2015 - 18:30
Another handy fact in squares
by RobertFontaine » 22 June, 2015 - 12:18
2
by Nodas
23 June, 2015 - 07:30
Triangles, Squares and Cubes more relationships
by RobertFontaine » 22 June, 2015 - 19:08
1
by Kinma
22 June, 2015 - 21:58
Using calculus to multiply integers
by RobertFontaine » 22 June, 2015 - 13:38
0
by RobertFontaine
22 June, 2015 - 13:38
Mental Calculation as a Visual Construct
by RobertFontaine » 17 June, 2015 - 11:40
4
by Kinma
18 June, 2015 - 01:30
A nice paper on Napier and Logarithms.
by RobertFontaine » 16 June, 2015 - 14:36
1
by Kinma
17 June, 2015 - 10:47
Nichomacus' Theorem - sum of cubes equal the sum squared.
by RobertFontaine » 16 June, 2015 - 11:55
0
by RobertFontaine
16 June, 2015 - 12:20
Multiplication tables - expanding to 20X20
by Kinma » 15 June, 2015 - 15:29
3
by Kinma
16 June, 2015 - 02:37
O... I.. C.. Doh... Another obvious epiphany
by RobertFontaine » 15 June, 2015 - 11:42
4
by Kinma
16 June, 2015 - 02:19
Squaring 3 digital number... More fun with squares
by RobertFontaine » 11 June, 2015 - 20:18
1
by RobertFontaine
14 June, 2015 - 15:27
Patterns in the last two digits of Squares... Dimensions and Geometry
by RobertFontaine » 12 June, 2015 - 12:19
1
by Kinma
14 June, 2015 - 14:20
How to divide with decimals using a soroban?
by ArsDenisov » 12 June, 2015 - 13:24
1
by Kinma
14 June, 2015 - 13:46
Good old article on mentally calculation of exponents
by RobertFontaine » 12 June, 2015 - 18:56
1
by Kinma
14 June, 2015 - 13:33
How to retain what you need to calculate?
by ArsDenisov » 13 June, 2015 - 04:24
1
by Kinma
14 June, 2015 - 12:03
Mental Training
by RobertFontaine » 13 June, 2015 - 12:25
2
by RobertFontaine
14 June, 2015 - 11:18
Cross multiplication and powers
by ArsDenisov » 14 June, 2015 - 05:26
1
by RobertFontaine
14 June, 2015 - 10:07
Trick for squaring 2 digit numbers above 50
by Kinma » 23 November, 2013 - 23:34
7
by Kinma
12 June, 2015 - 06:47
Fun with squares... The next square..
by RobertFontaine » 9 June, 2015 - 20:16
3
by RobertFontaine
11 June, 2015 - 18:19
New to 3x2 Calculation - interesting effect
by RobertFontaine » 6 June, 2015 - 09:08
5
by Nodas
9 June, 2015 - 22:38
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