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Math Mammoth Addition 1

Math Mammoth Addition 1 math book cover
69 pages
(includes answers)

Sample pages (PDF)
Two Groups and a Total
Learn Symbols + and =
Missing Items
Sums With 6
Addition On Number Line
Sums With 9

Prices & ordering

PDF download US$4.40

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You will be purchasing the download from my authorized reseller Comecero, LLC.

Printed copy US$8.95

Buy at Lulu

Other bookstores (incl. Amazon):
Use ISBN 9781954358614.

Printed copy £4.20
US shipping available

Buy at Pingles Publishing

small flag of SpainEste libro en español

Math Mammoth Addition 1 is a worktext (includes both teaching and exercises), dealing with the concept of addition and addition facts within 0-10 (in few occasions numbers between 10 and 20 are used). The book is most suitable for first grade.

The book starts out with very easy addition problems within 0-5, using pictures. If the student does not yet know the symbols + and = , you can introduce them first orally. In other words, use blocks or rocks and make addition problems where you use both kinds of wordings: “Three blocks and four blocks makes seven blocks. Three blocks PLUS four blocks EQUALS seven blocks.” Play like that until the child can use the words PLUS and EQUALS in his/her own speech. This will make it easier for him/her to use the written symbols.

Soon the lessons start including “missing addend” problems. We first use pictures, and gradually get to the abstract 1 + __ = 5 with symbols only. Keep in mind that children may confuse this problem with
1 + 5 = __. You can word these problems like this: “1 and how many more makes 5?” You can MODEL them by drawing: First draw 1 ball. Tell the child that we need to have a total of 5 balls. He is to draw more until there are five balls. In the missing addend problem, however many balls the child has to draw is the number that goes on the empty line. So, first there is one ball, then we need to add (draw) some more to make 5. But how many more were drawn?

After that, the book contains many lessons called Sums with... whose goal is to help the child memorize addition facts.

My approach to memorization is many-fold:

  1. Structured drill, such as you see in the lessons Sums with 5, Sums with 6, and so on. This is not random drill, because you will start it by showing the pattern or the structure in the facts. This will help the student to tie the addition facts in with a context and help him understand the facts more on a conceptual level, instead of merely memorizing them at random. In sums with 5, the child learns the number combinations that add up to 5: 0 & 5, 1 & 4, and 2 & 3. This understanding is the basis for the drills.

  2. Using addition facts in games, in math problems, everyday life, or anywhere else. Games are especially useful because they help children like mathematics.

  3. Random drilling may also be used as a tool among others.

  4. Memory helps such as silly mnemonics or writing math facts on a poster and hanging it on the wall. These are not needful for all children.

However, keep in mind that children will need LOTS of opportunities to add numbers to actually memorize the facts, so the memorization may not totally occur as your child works through this book. These same addition facts are further studied and used in the Math Mammoth Subtraction 1 book, and in all later math work since they are constantly used. At the latest, your child should memorize addition facts during second grade.

I have also made a set of videos that matches the topics covered in this book.

The PDF version of this book can be filled in on a computer, phone, or tablet, using the annotation tools found in many PDF apps. See more.

Check out also these free addition games and activities at our site: You might also be interested in the following books and worksheet resources:
  • Math Mammoth Subtraction 1 – a worktext about subtraction concept, difference, fact families, addition and subtraction facts within 0-10, and word problems (grade 1).
  • Math Mammoth Add & Subtract 2-A – a worktext about "easy" additions and subtractions within 0-100, memorizing the basic addition facts of single-digit numbers, and word problems (grades 1-2).
  • Math Mammoth Place Value 1 – a worktext about two-digit numbers (place value), comparing, rounding, even & odd, and graphs (grade 1).
  • Free addition worksheets for grade 1 – includes single-digit addition, double-digit addition, adding multiples of ten, and missing number addition problem worksheets.

Customer Testimonials

I purchased the Blue books and am using them to homeschool my six year old daughter. She has no previous math experience and has only homeschooled.

We have been using the Addition 1 and Place Value 1 books mostly. I give her a page or two at a time and we go over what needs to be done. Then she completes the pages on her own and we review them together the next day.

One of the things I like about Math Mammoth is the many different ways a skill is practiced. Grace has a much better grasp of addition than I did at six, partially because of all the different kinds of practice she gets.

Susan Kincaid

1 December 2008
From a homeschooling parent:
I am SO THRILLED at how well my daughter is doing with her math now. She is in first grade, and we've been using Horizons all year. We've tried a few other programs, and I was mostly happy with Horizons. The only thing we had trouble with was the part of the lesson where you skip count every day and the 5 minutes with flashcards to memorize addition facts.

My daughter HATES flashcards, and I felt like this exercise (along with the skip counting for numbers like 4,7, etc.) was going in one ear and out the other. She would recite and not retain. It was not working for us, we both began to dread it, and I finally stopped doing it. I figured as long as she could count quickly on her fingers, then she would eventually learn the basic addition facts.

But it started getting harder and harder to get by on that, she was getting frustrated, and math was beginning to go from her favorite subject to her least favorite. So I got your Addition 1 blue book to take a break from Horizons and work on math facts.

We have been so happy with it, that I went ahead and bought a few more blue books to cover the rest of the year, and I'm switching completely from Horizons! I love that it doesn't require a lot of instruction on my part (I have a 4th baby on the way, and this is a HUGE plus!) and that she gets enough practice on a topic at one time. I understood the reason behind the spiral method, but it just wasn't working well for us. And my daughter resisted boring "drill sheets."

I used the number rainbows for the lower numbers, so she could get the idea of the number families
[from Add Subtract 2-A book] and we've been playing the card games as well. She was so close to knowing her addition facts, but she hadn't really stopped to think about them--she was just trying to get through each day's assignment (before). Now, I really feel like she's getting it. Breaking them down into each number family has really helped--Horizons didn't do that. And I think she likes it that there isn't this big session of instruction. She doesn't have to sit through something she already gets, and can ask me questions if there's something challenging. I think she really likes the independence of it.

I plan on getting the Grade 2 curriculum next year--you've converted us! I can't believe I've paid so much money for these complicated and time-consuming math programs in the past. Math Mammoth really is a gem and I'll be spreading the word.

Maria Wright

Better Yet - Bundle Deals!

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How and where to order

You can buy Math Mammoth books at:

  • Here at website — simply use the "Add to cart" buttons you see on the product pages.
  • Rainbow Resource carries printed copies for the Light Blue series books, plus several CDs (Light Blue and Blue series).
  • Homeschool Buyers Club offers download versions of the Light Blue series, plus the Blue series bundle.
  • Homeschool Planet sells the digital versions of the main curriculum and lesson plans to go with them.
  • K5 Learning offers download versions of the Blue series.
  • TPT sells the Light Blue Series downloads, plus topical units.
  • Lulu sells printed copies for most of the Math Mammoth materials (various series).

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.

Math Mammoth books are PDF files. I recommend you use Adobe Reader to view them, including if you use a Mac. You can try other PDF viewers, but they may at times either omit or mess up some of the images.

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