( PICTURE – MUSOORIE NEAR DEHRADUN )
MATHEMATICS TEACHER
http://mathworld.wolfram.com//
(Please click on the photo to get enlarged view)
MATHEMATICS TIPS
1. To multiply any number by 5 add one zero to that number and divide by 2.
eg. 45×5 = 450/2 = 225
2. To multiply any number by 25 add two zeroes to that number and divide by 4.
eg. 255×25 = 25500/4 = 6375