testing header
Math Goodies is a free math help portal for students, teachers, and parents.
Free Math
Newsletter
 
 
Interactive Math Goodies Software

Buy Math Goodies Software
testing left nav
Math Forums @ Math Goodies
Math Forums @ Math Goodies
Home | Profile | Register | Active Topics | Members | Search | FAQ
Username:
Password:
Save Password
Forgot your Password?

 All Forums
 New Visitor Forum
 Testing Forum
 tricks.
 New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

ever22
Junior Member

United Kingdom
3 Posts

Posted - 05/12/2012 :  16:43:37  Show Profile  Reply with Quote
Does anyone know any mathematical tricks for multiplying two digit number by three digit number mentally
Go to Top of Page

Tessa
Average Member

USA
14 Posts

Posted - 06/03/2012 :  05:10:34  Show Profile  Reply with Quote
hello ever22! I hope that this might help you!
Multiply right-most digits of both the numbers and write down the ones; carry, if any.
(e.g smiley face for where you're meant to multiply)
??
x?
Multiply the:
right digit of 2nd number with middle digit of 1st number.
left digit of 2nd number with right digit of 1st number.
Add both the results together plus carried digit; write down the ones and carry.
Multiply the
right digit of 2nd number with left digit of 1st number.
left digit of 2nd number with middle digit of 1st number.
Add the results together plus carried digit; write down the ones and carry.
Multiply left-most digits of both the numbers and add carried digit; write it down.
Good luck! I'm sorry if it is a little confusing! I would put in pictures to help if I could but....
Go to Top of Page
  Previous Topic Topic Next Topic  
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
Math Forums @ Math Goodies © 2000-2004 Snitz Communications Go To Top Of Page
This page was generated in 0.11 seconds. Snitz Forums 2000
testing footer
About Us | Contact Us | Advertise with Us | Facebook | Blog | Recommend This Page




Copyright © 1998-2014 Mrs. Glosser's Math Goodies. All Rights Reserved.

A Hotchalk/Glam Partner Site - Last Modified 21 May 2014