Tag: multiplication

Multiplication of 2 numbers that are near to 100 or 1000

January 16th, 2009 | 3 Comments

This tip is suitable for multiplying two numbers that are near to 100. For example, 103 x 104 and 97 x 98.

continue reading


Multiplication of any number by a number near 100

January 15th, 2009 | 1 Comment

It 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?

continue reading


Multiply a number by 11

September 11th, 2008 | 7 Comments

Multiplying 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.

continue reading


Product of a single digit number with 9

August 11th, 2008 | 7 Comments

This algorithm is useful for kids that are lazy enough to memorize the multiplication table of 9.

continue reading


Box multiplication

April 24th, 2008 | 1 Comment

The box multiplication technique is suitable for people that has problem with numbers, since it will organized all the number in place.

continue reading