Home Add & Subtract mentally and in columns
with three-digit numbers.
Self-teaching printable workbook for grade 2 or 3.
 

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Math Mammoth Add & Subtract 3

Math Mammoth Add & Subtract 3 math book cover
84 pages
(includes answers)

Sample pages (PDF)
Contents and Introduction
Add & Subtract Whole Hundreds
Completing the Next Hundred
Word problems
Addition/Subtraction Connection
Subtract in Columns
Subtracting 2-Digit Numbers Mentally

Prices & ordering

PDF download $5.00

Buy download at Kagi
(credit cards, Paypal, check, cash, PO, wire transfer, money order; Kagi shopper help)

Buy download at Currclick
(credit cards, Paypal)


Printed copy $9.95, b&w

Buy printed book at Lulu
(credit cards, Paypal, PO)

small flag of SpainEste libro en español

November 2011 - the PDF version of this book is now enabled for annotation!
This means that if you prefer, your student can fill it in on the computer, using the typewriter and drawing tools in Acrobat Reader version 9 or greater.

Math Mammoth Add & Subtract 3 continues the study of adding and subtracting, this time with 3-digit numbers. The book is suitable to study after the student has learned place value till 1,000. It is best suited for second and third grade. The goal of the book is that the student is able to add and subtract both mentally and in columns within 0-1000.

First the book explores mental math topics. We study adding and subtracting whole hundreds, whole tens, and ones within 0-1000, often comparing to similar problems within 0-100. Also covered is rounding to nearest ten and how to estimate sums and differences using rounding.

In most lessons, the addition or subtraction is first illustrated with a visual model so the student can learn the concepts. You can obviously also use manipulatives to this end.

The latter part deals with adding and subtracting in columns within the range 0-1000, explaining in detail the how you regroup both tens and hundreds (in adding), or how you regroup two times in subtraction. Typically the processes of regrouping in addition and subtraction are first practiced using visual (picture) exercises, to ensure the student also understands what is going on.

The lesson Another Way to Subtract explains a different subtraction algorithm, which may be easier for some children. This lesson is totally optional, and the teacher or parent should decide whether to teach this different algorithm.

Besides problems that practice regrouping, many lessons also have word problems, puzzles, and other types of exercises.


You might also be interested in:
  • Math Mammoth Add & Subtract 4—a worktext about mental addition and subtraction strategies, regrouping, Roman numerals, the connection between addition and subtraction, order of operations, bar graphs, line graphs, and money problems (grades 3-4).
  • Math Mammoth Place Value 2—a worktext about three-digit numbers (place value), comparing, ordering, rounding, bar graphs, and pictographs (grade 2).
  • Math Mammoth Place Value 3—a worktext about four-digit place value, adding & subtracting 4-digit numbers mentally, rounding, estimating, and order of operations (grade 3).
  • Make It Real Learning: Arithmetic I—an activity workbook with real-world data, focusing on situations that use addition, subtraction, estimation, division, bar graphs, and place value with large numbers (grades 3-6).

Better Yet - Package Deals!
Blue Series - $95 (download) or $100 (CD)
Blue Series for grades 1-3 - $38 (download)
Blue Series for grades 4-6 - $57 (download)
Light Blue Series - $136 (download) or $141 (CD)
Light Blue Series for grades 1-3 - $68 (download)
Light Blue Series for grades 4-6 - $68 (download)
Golden/Green Series - $65 (download) or $70 (CD)
All Inclusive - $192 (download) or $197 (CD)
"Everything" Bundle - $240 (download only)

Learn more about these Math Mammoth bundles!

*BONUS*: Buy any bundle 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 any one of the Math Mammoth bundles 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 at:

  • Kagi store - all of the downloads and CDs. I maintain five different order pages at Kagi:

    Kagi accepts all major credit cards, Paypal (USD), checks, cash, money orders, purchase orders, wire transfers, TrialPay, 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 see the download links on the receipt page. You will also 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.

    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 carries all Blue, Golden, and Light Blue series books as downloads. They accept credit cards and Paypal. You will be able to download the products immediately upon the purchase, and also return to your account at CurrClick to redownload.

  • Lulu offers printed copies for the Blue, Golden, and Light Blue series books. You can also find links to Rainbow Resource on the individual product pages on this site.

  • Rainbow Resource carries printed copies for the Light Blue series books, plus the Light Blue CD. You can also find links to Rainbow Resource on the individual product pages on this site.

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. You will need Adobe Acrobat Reader to view them, including if you use a Mac or Linux. You can try other PDF viewers, but they seem to either omit or mess up some of the images.

Math Teaching Emails

This is a little "virtual" email course. You will receive:

A package of 300 free worksheets and sample pages; 7 math teaching articles on various topics ranging from coherent curriculum to fractions; 2 emails discussing the books; My math newsletter (see archives).

Note: You will FIRST get an email that asks you to confirm your email address. PLEASE check also your SPAM/JUNK folder for this confirmation email.

Math Mammoth Tour

Confused about the different options? Take a 7-day virtual email tour around Math Mammoth! You'll receive:

A package of over 300 free worksheets and sample pages; 7 individual emails on 7 subsequent days that answer the most commonly asked questions, including "What is the difference between all these different-colored series?" My math newsletter (see archives).

This way, you'll have time to digest the information over one week, plus an opportunity to ask me personally which book would be right for your child or students.

Note: You will FIRST get an email that asks you to confirm your email address. PLEASE check also your SPAM/JUNK folder for this confirmation email.