What's New

#fix lesson - multiply differing by 1
#minor changes

App Description

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$1.99->$0.99 for limited time.Don't miss out.
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Mencal is an app help you expand your ability to mentally solve math problems. All of us can do simple addition and subtraction of one or two digit numbers without a calculator.Now mencal is here to kick that ability into overdrive.

Mencal provides you with lessons and simple tricks to allow you to: work with three digit numbers; fractions of different styles regardless if you are adding them or subtracting them; and finding sums with multiplication and division. Then it will test you on your grasp and knowledge of the methods you've learned.

• Example:
- Same ten's digit,1's sum to 10
38×32=1216
①:Multiply tens place digit by itself plus 1
(3+1)×3=12
②:Add two zeros to the end of step①
12<—00=1200
③:Multiply the two one's digits together
8×2=16
④:Add the results of step ②and③
1200+16=1216

• Quickly Square:
- Square numbers made up of 1's
- Square numbers made up of 3's
- Square numbers in the 90's
- Square numbers ten`s digit is 0
- Square a number ending in 25
- Square numbers made up of 6's
- Square numbers made up of 9's
- Square a number ending in 1
- Square a number ending in 5
- Square a number ending in 9
- Square numbers in the 10's
- Square numbers in the 40's
- Square numbers in the 50's
- Square numbers in the 500's
- Square numbers in the 600's
- Square numbers in the 700's
- Square numbers in the 800's
- Square numbers in the 900's

•Standard:
- Same ten's digit, 1's sum is 10
- Same ten's digit, 1's sum isn`t 10
- Same 1's digit, ten's digits sum is 10
- Same 1's digit, ten's digits sum isn`t 10
- two-digit number ab×cc (a+b=10)
- ab×ccc.....c (a+b=10)
- Multiply by 11
- 2-digit number if 1's digit is 1
- 2-digit number if tens place digit is 1
- 2-digit number ×2-digit number(universal)
- Multiply differing by 5
- Multiply differing by 6
- Multiply differing by 7
- Multiply differing by 8
- Multiply differing by 9
- Multiply differing by 10
- Multiply two numbers that in the 90‘s
- Two-digit number like ab+ba
- Three-digit number like abc+cba
- Two fractions like 1/a+1/b
- Two fractions like (a-1)/a + (b-1)/b
- Sum of first n odd numbers
- Sum of first n even numbers
- Two-digit number like ab-ba
- Three-digit number like abc-cba
- m-n if m+n=100,1000,10000...
- Two fractions like 1/a-1/b
- Two fractions like c/a-c/b
- Two fractions like (a-1)/a-(b-1)/b
- Divide any number by 5
- Divide any number by 25
- Divide any number by 125
- Divide any 3-figure number by 9

"This app rocks!! Great for Math Team practice!" -by Bubba Smith
"Great app, make me feel less stupid" -by Howie_Serious
"Its a useful app for anyone who wants to know the numbers deeper" -by sjzbim
"It's a good app for both kids and sometimes even adults" -by Willwang

Love mencal or have a question? We would love to hear your feedback! Contact us anytime at [email protected]

iPhone Screenshots

(click to enlarge)

Mencal:Fantastic Mental Math Tricks screenshot 1 Mencal:Fantastic Mental Math Tricks screenshot 2 Mencal:Fantastic Mental Math Tricks screenshot 3 Mencal:Fantastic Mental Math Tricks screenshot 4 Mencal:Fantastic Mental Math Tricks screenshot 5

iPad Screenshots

(click to enlarge)

Mencal:Fantastic Mental Math Tricks screenshot 6 Mencal:Fantastic Mental Math Tricks screenshot 7 Mencal:Fantastic Mental Math Tricks screenshot 8 Mencal:Fantastic Mental Math Tricks screenshot 9

App Changes

  • April 26, 2013 Initial release
  • April 29, 2013 Price decrease: $1.99 -> FREE!
  • May 01, 2013 Price increase: FREE! -> $1.99
  • May 31, 2013 Price decrease: $1.99 -> $0.99
  • June 03, 2013 Price increase: $0.99 -> $1.99
  • June 30, 2013 Price decrease: $1.99 -> $0.99
  • July 04, 2013 Price increase: $0.99 -> $1.99
  • July 20, 2013 Price decrease: $1.99 -> $0.99
  • July 23, 2013 Price increase: $0.99 -> $1.99
  • October 10, 2013 New version 2.0
  • October 30, 2013 New version 2.1
  • October 30, 2013 Price decrease: $1.99 -> FREE!
  • November 02, 2013 Price increase: FREE! -> $1.99
  • January 11, 2014 Price decrease: $1.99 -> $0.99
  • January 17, 2014 Price increase: $0.99 -> $1.99
  • January 30, 2014 Price decrease: $1.99 -> $0.99
  • February 03, 2014 Price increase: $0.99 -> $2.99
  • February 10, 2014 Price decrease: $2.99 -> $1.99
  • February 22, 2014 Price decrease: $1.99 -> $0.99
  • February 24, 2014 Price increase: $0.99 -> $1.99
  • March 16, 2014 New version 2.2
  • March 17, 2014 Price decrease: $1.99 -> $0.99
  • April 02, 2014 Price increase: $0.99 -> $1.99
  • April 12, 2014 Price decrease: $1.99 -> $0.99
  • April 17, 2014 Price increase: $0.99 -> $1.99
  • May 01, 2014 Price decrease: $1.99 -> $0.99
  • May 04, 2014 Price increase: $0.99 -> $1.99
  • May 25, 2014 Price decrease: $1.99 -> $0.99
  • May 29, 2014 Price increase: $0.99 -> $1.99
  • June 03, 2014 New version 2.3
  • June 05, 2014 Price decrease: $1.99 -> $0.99
  • June 28, 2014 Price decrease: $0.99 -> FREE!
  • June 29, 2014 Price increase: FREE! -> $1.99
  • July 13, 2014 Price decrease: $1.99 -> $0.99
  • July 15, 2014 Price increase: $0.99 -> $1.99
  • July 22, 2014 Price decrease: $1.99 -> $0.99
  • August 16, 2014 Price increase: $0.99 -> $1.99
  • September 05, 2014 Price decrease: $1.99 -> $0.99
  • September 21, 2014 Price increase: $0.99 -> $1.99
  • September 26, 2014 Price decrease: $1.99 -> $0.99
  • October 19, 2014 Price increase: $0.99 -> $1.99
  • October 25, 2014 Price decrease: $1.99 -> $0.99
  • December 05, 2014 New version 3.0
  • January 29, 2015 New version 3.1
  • January 29, 2015 Price increase: $0.99 -> $1.99
  • February 12, 2015 Price decrease: $1.99 -> $0.99
  • March 13, 2015 New version 3.2
  • March 17, 2015 Price increase: $0.99 -> $1.99
  • May 07, 2015 Price decrease: $1.99 -> $0.99
  • May 14, 2015 New version 3.3
  • May 19, 2015 Price increase: $0.99 -> $1.99
  • May 24, 2015 New version 3.4
  • June 08, 2015 New version 3.5
  • June 12, 2015 Price decrease: $1.99 -> FREE!
  • June 15, 2015 Price increase: FREE! -> $1.99
  • July 09, 2015 Price decrease: $1.99 -> $0.99
  • July 14, 2015 Price increase: $0.99 -> $1.99
  • August 17, 2015 Price decrease: $1.99 -> $0.99
  • August 22, 2015 Price increase: $0.99 -> $1.99
  • September 29, 2015 Price decrease: $1.99 -> $0.99
  • October 07, 2015 Price increase: $0.99 -> $1.99
  • July 17, 2016 Price decrease: $1.99 -> $0.99
  • July 19, 2016 Price increase: $0.99 -> $1.99
  • August 18, 2016 Price decrease: $1.99 -> $0.99