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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.
– Same ten’s digit,1’s sum to 10
①:Multiply tens place digit by itself plus 1
②:Add two zeros to the end of step①
③:Multiply the two one’s digits together
④:Add the results of step ②and③