What's New

#fix lesson - multiply differing by 1
#minor changes

App Description

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

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