Exam Math Tricks

:First  of all , you need  to remember all this, before you do some really handy stuff: Remember table at least till 20 (as given below) :       Squares from 1 to 25 : Cube and Cube Roots 1 to 30 : Addition, Subtraction, Multiplication, Divisio n of large numbers. (Follow the Calculation Booster in ExamTyari app daily atleast 30 min to improve calculation skills) Understand below topics very clearly :  Whole Number  :  Whole Numbers are simply the numbers 0, 1, 2, 3, 4, 5, ... (and so on), But negative numbers (-1,-2,-3 .... ) and fractions numbers (0.01,0.02.0.3......) are not Whole number. Example :           0, 7, 212 and 1023 are all whole numbers         (But numbers like ½, 1.1 and 3.5 are not whole numbers .)    2. Integers :  All number (Either positive (+) or Negative (-) ) all are the Integers                Negative Integers : -1,-2,-3,-4........      Neutral Integers  : 0 (this number is neither Positive nor Neg

1. Adding large numbers Adding large numbers just in your head can be difficult. This method shows how to simplify this process by making all the numbers a multiple of 10. Here is an example: 644 + 238 While these numbers are hard to contend with, rounding them up will make them more manageable. So, 644 becomes 650 and 238 becomes 240. Now, add 650 and 240 together. The total is 890. To find the answer to the original equation, it must be determined how much we added to the numbers to round them up. 650 – 644 = 6 and 240 – 238 = 2 Now, add 6 and 2 together for a total of 8 To find the answer to the original equation, 8 must be subtracted from the 890. 890 – 8 = 882 So the answer to 644 +238 is 882. 2. Subtracting from 1,000 Here’s a basic rule to subtract a large number from 1,000: Subtract every number except the last from 9 and subtract the final number from 10 For example: 1,000 – 556 Step 1: Subtract 5 from 9 = 4 Step 2: Subtract 5 from 9 = 4