Since 98 is 100 minus 2, you can think of this as 136 + 100 - 2, or 236 - 2, the answer being 234.
calculating mentally, usually arithmetic
In math best
it is the method that use to discribe the set using word
mental math
Mathemagic
Place value partitioning
how to do mental math useing propertys
13.48 - 6.1 in mental math = 7.380000000000001
mental math is doing the math in your head or in your mind but not in a calculator or pencil and paper
Mental math is basically math in your head so for example 40x2=80 so I did that in my head
The shopkeeper's method, also known as the method of complements, is a technique used in mental math to subtract a number by adding the complement of that number to the next higher multiple of 10. This method is particularly useful for subtracting numbers close to multiples of 10.
50 what's "mental math" supposed to mean? if it just means you did it in your head, then there is no difference between mental and regular math, except that it is harder to check your work.
From what i have learned in my math class a census is the most reliable method but is not always applicable so simple random method is the next best.
Mental Math Mostly
Eisner Hewer invented traditional method in math
A Way of doing something a Math. Example: The Prime Factorization Method.