logo
g Text Version
Beauty & Self
Books & Music
Career
Computers
Education
Family
Food & Wine
Health & Fitness
Hobbies & Crafts
Home & Garden
Money
News & Politics
Relationships
Religion & Spirituality
Sports
Travel & Culture
TV & Movies

dailyclick
Bored? Games!
Nutrition
Postcards
Take a Quiz
Rate My Photo

new
Romance Movies
Creativity
Family Travel
Southwest USA
Irish Culture
Home Finance
Comedy Movies


dailyclick
All times in EST

Low Carb: 8:00 PM

Full Schedule
g
g Math Site

BellaOnline's Math Editor

g

Multiplication Facts - 12s


Don’t allow the twelve timetables to frighten you. They are full of patterns which make mental math and memorization easier than you think.


Twelve Timetables

Wow, you’ve made it to the twelve timetables! Don’t stop practicing all the other timetables. We’ll use them to learn the 12s. Let’s start with finding patterns. Patterns are helpful when you take the initiative to write the timetables on an assignment or test before you begin to work any problems. Then, use the patterns to check for accuracy.

12 x 1 = 12
12 x 2 = 24
12 x 3 = 36
12 x 4 = 48
12 x 5 = 60
12 x 6 =72
12 x 7 = 84
12 x 8 = 96
12 x 9 = 108
12 x 10 =120

Pattern One: Look at 12 x 1 through 12 x 4. The tens digit in the product is the same as the number multiplied by twelve. Thereafter, the tens digit in the product / answer is one more than the 2nd factor or number multiplied by twelve.

Pattern Two: The digit in the ones place of the product skip counts by 2 and starts over after the count reaches 8.

Pattern Three: The first digit in the product are in numerical order with the exception ‘5’ and ‘11’ are skipped.



Mental Strategy for 12 x12 thru 12 x 19

12 x 12 = 144
12 x 13 = 156
12 x 14 = 168


Example: 12 x 13 =
Steps:
1. To get the first two numbers of the answer: Add 12 and the ones digit of the other number. 12 + 3 = 15
**2. To get the last digit of the answer: Multiply “2” which is the ones digit of “12” and the ones digit of the other number. In this case, “3.” 2 x 3 = 6
3. Thus, the answer is 156.


**When the sum in step two is larger than nine. . .
Example:
12 x 15 =
Step 1) To get the first two numbers of the answer: Add 12 and the ones digit of the other number. 12 + 5 =17
Step 2) To get the last digit of the answer: Multiply “2” which is the ones digit of “12” and the ones digit of the other number. In this case, “5.” 2 x 5 = 10
(The zero is the last digit of the answer. The “1” is added to the 17....thus the answer is 180)


Try it and check your answer below.

12 x 16 = 192
12 x 17 = 204
12 x 18 = 216
12 x 19 = 228

Did you notice the previous patterns still apply?





Add Multiplication+Facts+%2D+12s to Twitter Add Multiplication+Facts+%2D+12s to Facebook Add Multiplication+Facts+%2D+12s to MySpace Add Multiplication+Facts+%2D+12s to Del.icio.us Digg Multiplication+Facts+%2D+12s Add Multiplication+Facts+%2D+12s to Yahoo My Web Add Multiplication+Facts+%2D+12s to Google Bookmarks Add Multiplication+Facts+%2D+12s to Stumbleupon Add Multiplication+Facts+%2D+12s to Reddit




How to Divide
Multiplication Facts - 11s
RSS
Related Articles
Editor's Picks Articles
Top Ten Articles
Previous Features
Site Map


For FREE email updates, subscribe to the Math Newsletter


Past Issues


print
Printer Friendly
bookmark
Bookmark
tell friend
Tell a Friend
forum
Forum
email
Email Editor


Content copyright © 2014 by Beverly Mackie. All rights reserved.
This content was written by Beverly Mackie. If you wish to use this content in any manner, you need written permission. Contact Beverly Mackie for details.

g


g features
Travel Games

Math MOOC - Free Online Math Courses - Self-Paced

Interactive App for Student Engagement

Archives | Site Map

forum
Forum
email
Contact

Past Issues
memberscenter


vote
Poetry
Daily
Weekly
Monthly
Less than Monthly



BellaOnline on Facebook
g


| About BellaOnline | Privacy Policy | Advertising | Become an Editor |
Website copyright © 2014 Minerva WebWorks LLC. All rights reserved.


BellaOnline Editor