Math Mammoth Add & Subtract 2-A - basic facts within 0-18.

This book also deals with the concepts of completing the ten, and how to use that when adding: for example 9 + 5 can be seen as 9 + 1 + 4, where 9 + 1 completes the ten, and so we have 4 left over to go over ten.

With subtracting, the child first subtracts TO ten with problems such as 16 − __ = 10. Then come subtraction problems which "cross" the ten the other direction, such as 16 − 7. Again the student first practices these by subtracting in two parts: first subtracting to ten, then the rest. For example, 16 − 7 becomes 16 − 6 − 1.

Later in the book various fact families are studied, including with the help of pretty "number rainbows".

Testimonials

I have a 2nd grade daughter who just "didn't get" math. We've been using another well known math program which was just moving too fast for her. Fortunately, I had purchased Mammoth Math [Add & Subtract] 2A over the summer and it has turned her into an "I get it" kid! We just completed 2A and will be starting 2B shortly. It's been an awesome supplement and my daughter looks forward to her daily math worksheets!
I can't believe how much more confident she's become in her computation skills and she's even soaring with the story problems. Thanks Mammoth Math!
1 December 2008

The following is one of the winning entries to Math Mammoth 2008 Thanksgiving Contest.

Tomorrow we will finish the final two pages in your Blue Addition/Subtraction 2-A. My 10 yo daughter, Gracie, has Autism, and nearly every math we have tried so far has been a impassable trial for her. I really didn't know what to do anymore! Our family has been homeschooling since 1993, and Gracie is our third child, but she has difficulties that our other two simply did not have. I remembered your website from previous web searches, and after reading about your Light Blue series, a light bulb went on! Why not address her individual math skill needs instead of trying to tackle a whole curriculum again? With each of your books costing only a few dollars, there was no risk at all! I ordered the Blue Addition/Subtraction 2- A, downloaded, and printed that very day.

Well, it turned out to be just what Gracie needed! You teach math topics efficiently and interestingly, with no extraneous fussiness. After doing a few weeks of your math (slowly - 2 pages per day) Gracie asked to know a bit more about the writer. We went online so she could read your "about" page, and was so pleased to put a name and face to your math books. You see, she discovered that you like patterns, and believes you hide patterns all through your math worksheets. In fact, she now notices lots of math patterns quickly, and makes extra effort with her math worksheets to make sure Mrs. Miller doesn't "trick" her. Her ability to see patterns makes learning math facts so much easier. It never occurred to me (or my Engineer husband) to explain math the way you do. You seem to be speaking her "math language" and - finally - math makes sense to her.

Today, I'll be ordering the Blue A/S 2-B, so we can carry on with Gracie's math seamlessly. I'm so thankful you wrote this particular (Blue) series. I'm sure most homeschoolers order the Light Blue Full Curriculum, and I hope it's a good fit for them. But, there are students (perhaps with Special Needs, or just with Math Phobia) who just can't manage a full curriculum. I hope they'll consider the Blue series, which attacks math skills individually, in a way which builds skill-upon-skill, and teaches little patterns and tricks in a very do- able (and reasonably priced!) format.

Cheers,
Lauri Bolland (and Gracie)

Thank you so much for new edition of the Add/Subtract 2a book!! I gave the new pages as homework tonight and am amazed to see the excitement the rainbows have created working with inverse operations/fact families. Thank you, again! I love incorporating your worksheets into our lessons it has made my children confident independent workers! Your newsletters and blogs are so worth the read!! The information you have and receive about math is making a tremendous difference in my home everyday!! Your consideration, work, time, and effort is greatly appreciated by my family.

Shai Hawk

The followup to this book is Add & Subtract 2-B, which practices adding and subtracting two-digit numbers mentally and in columns (carrying and borrowing).

Better Yet - Package Deals!
Blue Series package - $70 (download) or $75 (CD)
Blue Series for grades 1-3 - $40 (download)
Golden/Green Series package - $65 (download) or $70 (CD)
Light Blue Series package - $89 (download) or $94 (CD)
Blue/Golden/Green Series package - $110 (download) or $115 (CD)
All Inclusive package - $145 (download) or $150 (CD)

Learn more about the package deals!

*BONUS*: Buy any package listed above, and get the fully upgraded Soft-Pak software with more features and options for FREE (includes 4 math, 1 language arts, 2 testing programs).

*BONUS* - SOFT-PAK MATH SOFTWARE

I bet you'd have to agree: this is a steal! You can get Soft-Pak math programs (list price $24.95) for just a small $3.50 s&h fee - just by ordering ANY of my books at Kagi or CurrClick!

* Math Maker, for printable math activities with answer keys
* Math Master, for on screen practice of various math topics
* Math User, for answering the 900 multi-level word problems
* True/False Math Challenger for mastering facts 1-12


NOTE: if you purchase one of the package deals at Kagi store, you will get Soft-Pak in the download or included on the CD for FREE.

Soft-Pak may also be purchased at great 75% discount without a Math Mammoth purchase - click here for details.

How and where to order

You can buy Math Mammoth books as downloads at

• Kagi store - all of the ebooks and CDs. Kagi accepts all major credit cards, Paypal, check, cash, money order, purchase order, and a wire transfer. I maintain four different order pages at Kagi:
  • One for the Blue series,
  • another for the Golden and Green Series, and
  • third for the LightBlue complete curriculum products, and
  • one more for the Packages (CDs or downloads).
  • And yet an order page for Make It Real Learning workbooks.

  Kagi accepts all major credit cards, checks, Paypal (USD), money orders, and even cash. Read more about the payment methods here. Please see Kagi Shopper Help for any other questions about the ordering process.

  After completing the order at Kagi, you will receive an email with download links for each book you bought, or for a zip file for the packages. You click on the links and download the books to your computer's hard drive. That's it!

  In case of any problems with the download, you can always email me, and I can email the books to you directly. My contact info will be in the email you receive.

  
   
• CurrClick.com - all Blue, Golden, and Lightblue series books (downloads). Credit cards, Paypal.
• The Old Schoolhouse Store - the Blue Series ebooks. Credit cards, Paypal.
• Lulu - printed copies for the Blue, Golden, and Light Blue series books.
• Winterpromise - printed copies and CDs for the LightBlue series.

All the books are available for *nearly instant download.
*Order processing at Kagi takes 1-2 hours; I do not know how quick it is at the other stores.

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Printed copies

You can buy printed copies of the Blue, Golden, and Light Blue series books at Lulu.com. You can find a links to the printed copy also on each individual book's page (right sidebar).

Winterpromise sells printed copies for the Light Blue series books along with CDs.

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By purchasing any of the books, permission IS granted for the teacher (or parent) to reproduce this material to be used with his/her students in a teaching situation; not for commercial resale. However, you are not permitted to share the material with another teacher.

In other words, you are permitted to make copies for the students/children you are teaching, but not for other teachers' usage.