The strategies below are just some of many that can be used to help your child memorize and recall addition and subtraction facts.
The guidance and practice exercises in this section have been graciously provided by Susan Greenwald, MA Ed. and are taken from her Two Plus Two is Not Five workbook. Learn more about Susan Greenwald here and the three books she has written on teaching math facts.
This section introduces addition and subtraction facts with a number of easytouse tricks that can be used together with the practice activities, to help memorize basic facts. These tricks are listed below in pairs:
Follow these steps to help your child memorize basic addition and subtraction facts using the tricks from Susan Greenwald's Two Plus Two Is Not Five workbook.
Note: Be sure your child can demonstrate the meaning of addition and subtraction before working on memorizing facts.
Can you count to 10?
Tell what comes next:
1 , ____  3 , ____  5 , ____  7 , ____  9 , ____ 
4 , ____  7 , ____  2 , ____  8 , ____  6 , ____ 
9 , ____  5 , ____  6 , ____  4 , ____  3 , ____ 
What is one more? Write the greater numbers.
3  
2  3  7  9  4  6  1  
8  5  6  3  9  5  7 
Go up like an elevator.
9+1= 10
8+1= 9
7+1= 8
6+1= 7
5+1= 6
4+1= 5
3+1= 4
2+1= 3
1+1= 2
0+1= 1
Practice Number +1 with your child. You can use this printable worksheet on which you can try the above steps as well as answer questions using the Number +1 trick.
Carry out the following two steps:
1. Look at the examples below and then try this worksheet to practice more with the Number +1 trick.
Look. These are the same.

2. After completing the worksheets you can use these flashcards to help review and memorize the +1 and 1+ facts.
2
+ 2 1
+ 1 5
+ 5 2
+ 2 5
+ 5 1
+ 1 5 + 5 
Review the Doubles above and then try the following three steps:
1. Practice Doubles and Number +1 together on this printable basic facts worksheet.
Look. These are the same.

2. Look at the two different ways above to write the same addition fact. Both ways mean the same thing. Remember this when you try this worksheet to practice Doubles and Number +1.
3. After completing the worksheet, print out and use these flashcards to help review and memorize some of the doubles facts.
Count Backwards
10  7  5  9  4  8  6  3  2 
___  ___  ___  ___  ___  ___  ___  ___  ___ 
Write the number that is one less.
3  10  8  6  5  9  4  
2  
7  9  10  4  7  2  8  
What comes before?
____ , 10  ____ , 3  ____ , 9  ____ , 6 
____ , 8  ____ , 7  ____ , 5  ____ , 2 
____ ,4  ____ , 10  ____ , 6  ____ , 8 
____ , 9  ____ , 5  ____ , 4  ____ , 3 
Try this printable worksheet on which you can try the above steps on paper.
Review the candy bar examples shown below and then try following the three tasks:
3
+ 3 2
+ 2 3
+ 3 5
+ 5 2
+ 2 3
+ 3 1 + 1 
5
+ 5 3
+ 3 1
+ 1 3
+ 3 5
+ 5 2
+ 2 3 + 3 
Carry out these two tasks:
3 + 0 = ____  4 + 0 = ____  8 + 0 = ____ 
6 + 0 = ____  5 + 0 = ____  7 + 0 = ____ 
Review the above and then carry out the following four steps:
4
+ 4 3
+ 3 4
+ 4 5
+ 5 2
+ 2 4
+ 4 1 + 1 
2
+ 2 5
+ 5 3
+ 3 4
+ 4 1
+ 1 2
+ 2 4 + 4 
3
+ 3 4
+ 4 2
+ 2 1
+ 1 5
+ 5 4
+ 4 3 + 3 
Review the above with your child and then work through the following three steps
Learn Doubles Subtraction. What are the missing numbers below?
5
+ 5 2
+ 2 2
+ 4
5
+ 10
2
+ 4
4
 2 5 + 10

10
 5 4
 2 1
+ 1 5
+ 5 10
 5
10
 5 4  2 
5
+ 5 3
+ 3 10
 5
2
+ 2 2
+ 4
4
 2 5 + 5 
4
 2 10
 5 3
+ 3 10
 5 4
 2 4
+ 4 4  2 
Review the above and then try the following steps:
Discuss Right Next To Each Other with your child and then tackle the four tasks below:
You know 
Learn 
You know 
Learn 

3 + 3 6 
6  3 3 
4 + 4 8 
8  4 4 
What numbers are missing below?
3
+ 3 3
+ 6
6
 3 3
+ 6
4
+ 4 4
+ 8
8  4 
3
+ 6
4
+ 4 4
+ 8
8
 4 3
+ 6
6
 3 4 + 8

8
 4 6
 3 8
 4 10
 5 6
 3 4
 2 8  4 
Follow these three steps to practice with Doubles Subtraction and to review some of previously learned tricks.
2  4  6  8  10 
Practice Counting by 2s
2 , 4 , 6 , 8 , ___  2 , 4 , ___ , 8 , 10 
2 , ___ , 6 , ___ , 10  2 , 4 , ___ , 8 , ___ 
___ , 4 , 6 , ___ , ___  2 , __ , __ , __ , 10 
Count up by 2steps 
Look  These are the same
After working through the above examples, try the four steps below to practice 2Ladder as well as practice with all the other tricks.
The workbook is for ages six and up, and has reproducible pages to help students learn the math facts. Addition and subtraction facts to 18 are taught in an original way that does not just rely on drill and practice. Facts are grouped and associated with easytolearn methods and tricks.
The facts are introduced with a trick and then those facts are practiced by trick name with previously learned facts. After initial instruction, teachers/ parents can assign workbook pages for class work or homework to give children practice and review.
Two Plus Two Is Not Five includes 232 workbook pages, answer keys, a certificate of mastery, and recordkeeping pages.
Designed for any age student, this National Best Books 2008 AwardWinning book focuses on teaching children strategies to remember the multiplication facts. There are 148 worksheets for written practice and review, and this workbook includes a guide to introducing the facts.
You can read reviews of the workbooks here and you can buy them through this link.
Susan Greenwald MA Ed. has degrees in special education from the University of Arizona and Arizona State University and she is an educator with over two decades of success teaching math facts and mathematics skills. Susan has written three math books directed at teaching mastery of the math facts and is a soughtafter speaker and presenter.
You'll find more about Susan and her work along with helpful advice on helping children to learn math on her math book web site.
The information on this page is Copyright © 2006 by Susan R. Greenwald All Rights Reserved