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Two Plus Two Is Not Five (Easy Methods to Learn Addition & Subtraction) Paperback – April 7, 2006

4.5 out of 5 stars 44 customer reviews

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Editorial Reviews

About the Author

Susan R. Greenwald is an educator with many years of success teaching math facts and mathematics skills. She has written five math books.

Five Times Five Is Not Ten: Make Multiplication Easy, Two Plus Two Is Not Five: Easy Methods to Learn Addition and Subtraction, Addition and Subtraction: Beyond Math Facts and Ten Divided by Five Is Not Five: Using Multiplication to Make Division Easy are published by Longevity Publishing. Two Plus Two Is Not Five was the First Place winner in the Workbook category of the 2006 Evvy Book Awards.
Each of the workbooks support Common Core Standards. Teacher Created Resources published her first book, How to Teach Math Facts, in 1999.

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Product Details

  • Age Range: 5 and up
  • Grade Level: Kindergarten and up
  • Paperback: 254 pages
  • Publisher: Longevity Publishing (April 7, 2006)
  • Language: English
  • ISBN-10: 0977732304
  • ISBN-13: 978-0977732302
  • Product Dimensions: 10.7 x 8.5 x 0.7 inches
  • Shipping Weight: 1.3 pounds (View shipping rates and policies)
  • Average Customer Review: 4.5 out of 5 stars  See all reviews (44 customer reviews)
  • Amazon Best Sellers Rank: #209,044 in Books (See Top 100 in Books)

Customer Reviews

Top Customer Reviews

Format: Paperback
This book was so helpful to me at at time when my child was failing timed math tests at age 7- big F's on his papers- he started calling himself stupid and saying he was "bad in math." I was told to do more games and flash cards- but the systematic program and tricks in this book were really helpful. I thought this author amazing- she personally corresponded to me during a difficult time. I really recommend this book for any family struggling with what comes easy to some children- there is more than one way to learn math facts- and this was very helpful. I highly recommend.
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Format: Paperback
As an 17+ year teacher of students with learning disabilities and a college instructor to pre-service and in-service teachers, I recommend Two Plus Two is Not Five as the resource for teaching addition and subtraction facts to students with and without disabilities. This isn't a book of drill sheets - this is a workbook with a purpose! Two Plus Two is Not Five presents an instructionally sound and effective "twist" on the mundane task of rote learning math facts that will keep students engaged while becoming proficient and confident. If I could only have one math resource in my elementary classroom - this would be it.
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GREAT book for my struggling 2nd grader! At long last, after weeks of class-test failures, this is the one that brought the light to her sweet face. The tricks are pretty cool and mostly very helpful. For us, a few tricks were a little cumbersome to use. Nevertheless the arrangement of the lessons and the repetitions and refreshers together made it all WORK!

For those who want to hear the tricks that were hard for my child: Number In The Middle such as 8+6 is the same as Doubles 7+7. While this is useful and needed information, I think conceptually, this was a lot for my 7-yr old to switcheroo. Also a bit hard, Magic Nine, BUT she already had a handle that if she subtracts 10, then adds one back, she'll have it. So here, my girl had her own trick, and one shouldn't mess with what works. Nevertheless, DON'T let these minor criticisms deter you from buying--your child may love these tricks too OR you'll work through them like I did. The point is that IF you run into a difficulty like mine, you can manage it. A great, very well put-together book! I thank you wholeheartedly Susan R. Greenwald! (And shortly, on to the Multiplication book!)
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I have two preschoolers, and I can't be more pleased with the way Two Plus Two is not Five introduces math to them. Similar to Kumon (and quite possibly better than), Two Plus Two works in progressions and slowly gets harder as a new concept is introduced. The pages can be torn out to be written on, or you can photocopy the pages to keep the book intact. One thing I really like about the Two Plus Two workbook as opposed to the Kumon workbooks is that there are no "unnecessary pages". Kumon beginning adding books seem to all start with writing out your number pages, number connect the dot pages, and the like. While this workbook is more bland looking (there are no cut images of animals or boats or the like), the concepts are spot on and direct. For younger kids, this may be something of a turn off, however, you could always break a page down into two projects for the kids, or have them do only a few problems at a time until they can complete a page.

There is no adding or subtracting of two double digit numbers (10+25 or 20-12 equations), but there are plenty of adding and subtracting of double digit numbers with single digit numbers. There are also a lot of tricks to adding and subtracting, many of which I never learned and found were really helpful! This is a wonderful book for any kid who needs a little more help on math at school, or for home schooling kids. Highly recommended.
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My eight year old has learning disabilities struggled and struggled with addition and subtraction. As soon as she learned a fact it was forgotten. We tried software, flashcards, manipulatives, workbooks, tutoring and summer school. I decided to try Two Plus Two is Not Five.

Finally, my daughter is successful. She doesn't have to memorize math facts, but learns the facts by looking for numerical relationships (i.e. next to each other). After practice tools that build these skills she quickly sees the patterns presented and no longer has to depend on rote memorization and recall.
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This book was recommended in a professional development workshop presented by Linda Bailey. I purchased it 2-3years ago and have used it since with my first grade students. It is an excellent resource for math fact strategies. The facts/strategies are in correct math instructional trajectory. There are practice sheets for each. I consider it one of my standard math resources.
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I bought the book maybe 6 months ago my daughter really fussed because it seemed like the book was talking down to her, I think. Being in second grade and mom teaching you 2 + 3 just doesn't seem right.

Well, now summer session just started. I give her my own homework over the summer. I pulled this book back out. We had sporadically done it before and jumped around in Tier 1. I decided to start with Tier 2.

We're doing it! It's not learning, it's just finger addition for her-until she learns the rule. Learning the rule (and having to say it for each cumulative practice problem) takes it a step higher intellectually-and she does the book now!

In class, she had timed fact tests with similar problems. I wish we had used the book them! Next year will be multiplication facts. Addition is needed for that and almost any math problem. I'm so glad we have this book and I'm praying we finish it!

This fall, I'll get the multiplication fact book.
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