This tip is suitable for multiplying two numbers that are near to 100. For example, 103 x 104 and 97 x 98.
Multiplication of any number by a number near 100
January 15th, 2009 | 1 CommentIt is easy to multiply any number by 100. We just need to append two zeroes to the end of that multiplicand number. For example, 100 x 23 = 2300. But, what if the multiplier is a number that is near to 100, such as 101, or 99?
Multiply a number by 11
September 11th, 2008 | 7 CommentsMultiplying a one digit number by 11, is easy. For example, 2 x 11 = 22. We just repeat the number back twice.
What if we have 1334 x 11? This strategy could help us to multiply any greater than 2 digits number by 11.
Product of a single digit number with 9
August 11th, 2008 | 7 CommentsThis algorithm is useful for kids that are lazy enough to memorize the multiplication table of 9.
Box multiplication
April 24th, 2008 | 1 CommentThe box multiplication technique is suitable for people that has problem with numbers, since it will organized all the number in place.
