Simple Math Tricks for Faster Computations 1. Add or Subtract 2 or 3 Digit Numbers To add numbers that aren’t already a multiple of ten or one hundred, round the number to the nearest tens or hundreds digit, add, and then add or subtract by the number you rounded off. Do the opposite when subtracting. Examples: 144 + 48 = 144 + 50 – 2 = 192 1385 – 492 = 1385 – 500 + 8 = 893
2. Multiply Numbers Between 11 & 19 To multiply two numbers that are between 11 and 19, add the ones digit of one number to the other number, multiply by 10, and then add the product of the ones digits. Example: 14 × 13 = (17 × 10) + (4 × 3) = 182
3. Square Any Number Between 11 & 99 To square any number n, first find the nearest multiple of 10 and find out how much you would have to add or subtract (k) to get to that number. Then do the opposite function (addition or subtraction) to get two numbers that average out to n (i.e. n + k and n – k). Multiply those two numbers and add the square of k. Examples: 232 = (26 x 20) + 32 = 529 972 = (100 x 94) + 32 = 9409 Enroll now for GMAT Coaching Classes. Join the most popular GMAT Coaching Institute in Jalandhar and get your dream GMAT score! We deliver what we promise. Our passion to deliver high quality results continues to drive us and we will continue to help the students get top scores and gain admission into the top schools across the globe. For more details please log on to our website www.knowledgeicon.com Contact: +91-98555-51177/90412-22444. Address: SCO 408-410, 4th Floor, AGI Business Centre, Near Bus Stand, Jalandhar.