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Math Mammoth Grade 4 International Version

Math Mammoth Grade 4 International Version is a complete maths program for fourth grade, available both as digital and print versions.

cover for Math Mammoth Grade 4-B Complete Worktext
184 pages
164 lesson pages

cover for Math Mammoth Grade 4-B Complete Worktext
194 pages
173 lesson pages

Grade 4 contents and samples
User Guide, grade 4

Prices & ordering


Grade 4 full set: USD $42.50
(part A and B worktexts, answer keys,
tests, mixed revisions, worksheet
maker, and Soft-Pak)

Add to cart

Part 4-A only: USD $21.25
(part A worktext, part A answer key,
tests, mixed revisions, worksheet
maker, and Soft-Pak)

Add to cart

Part 4-B only: USD $21.25
(part B worktext, part B answer key,
tests, mixed revisions, worksheet
maker, and Soft-Pak)

Add to cart

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


Full set grade 4
USD $44.50 (digital version)

(the two worktexts, answer keys, tests, cumulative revisions, a worksheet maker, Soft-Pak)

Add to cart

Printed copies

You can purchase printed copies at Lulu. The prices below are in USD.

4-A worktext $15.45
4-B worktext $15.85
Tests & Mixed Revisions $8.90
Answer Keys $11.45

Skills Review Workbook

cover for Math Mammoth Grade 4 Skills Review Workbook

This workbook is supplemental, and provides additional practice for the topics in the curriculum. I recommend you only purchase it once you are sure the student does need supplemental practice. Learn more.

At the heart of the curriculum are two student worktexts (A and B), each covering about half a year of maths work. These worktexts contain all the instruction and the exercises in the same book — which makes lesson preparation a breeze. The worktexts are written directly to the student, and thus they allow many children (if they can read) to teach themselves and to learn directly from the books.

You will also get separate answer keys, chapter tests, additional cumulative revisions (I do recommend you use at least some of them), and a versatile worksheet maker (Internet access required) for those times when your child needs just a bit more practice.

This curriculum is essentially the same as the US version of Math Mammoth Grade 4, only customised for the international audience in these aspects:

  • The curriculum teaches the metric measurement units. Imperial units, such as inches and pounds, are not used.
  • The spelling conforms to British international standards (British English).
  • Page (paper) size is A4.
  • Large numbers are formatted with a space as the thousands separator (such as 12 394). (The decimals are formatted with a decimal point, as is used in the US version.)

In money-related word problems, the symbol used is "$" (dollar).

The US version of the curriculum is aligned to the Common Core Standards, which means this curriculum may not be properly aligned to the fourth grade standards in your country. However, you can probably find material for any missing topics in neighbouring grades, which means you can simply re-order the material to solve most incompatibilities between different standards.


  • Math Mammoth focuses on conceptual understanding. It explains the "WHY", so your children can understand the maths, not just learn "HOW" to do it.
  • Concepts are often explained with visual models, followed by exercises using those models. These visual models can take the place of manipulatives for many children; however, it is very easy to add corresponding manipulatives to the lessons if so desired.
  • The curriculum is mastery-oriented. This means it concentrates fairly long on a topic, delving into its various aspects. This promotes conceptual understanding, as opposed to spiral curricula that often tend to jump from topic to topic too much.
  • There is a strong emphasis on mental maths and number sense.
  • It requires very little teacher preparation, which is a big help to most parents. :)
  • The curriculum has no separate teacher's manual nor is it scripted. The introduction to each chapter has some notes for the teacher concerning the material in the chapter. All the instruction is written directly to the student in the worktext, and there also exist accompanying videos where you can see Maria herself teach the material.
  • After each chapter introduction, you will find a list of Internet links and resources (games, quizzes, animations, etc.) that can be used for fun, illustrations and further practice.
  • For multiplication tables and division facts, you can use our online practice program (free). Visit the pages for Multiplication Tables Online Practice and Division Facts Online Practice

Additional features for the download version

  • The PDF files can be filled in on a computer, phone or tablet, using the annotation tools found in many PDF apps. Learn more.
  • BONUS! The download version also comes with BONUS Soft-Pak programs. The 6 programs in Soft-Pak (4 math, 1 language arts, 1 list maker) offer both on-screen and printable activities in a low-graphic, high content format. Read more and see screenshots.

Overview of topics

In the fourth grade, students focus on multi-digit multiplication and division, learning to use bigger numbers, solving multi-step word problems that involve several operations and they get started in studying fractions and decimals. This is of course accompanied by studies in geometry and measuring.

The year starts out with a revise of addition and subtraction, patterns and graphs. We illustrate word problems with bar diagrams and study finding missing addends, which teaches algebraic thinking. Children also learn addition and subtraction terminology, the order of operations and statistical graphs.

Next come large numbers—up to millions, and the place value concept. At first the student revises numbers with thousands and does some mental maths with them. Next are presented numbers up to one million, calculations with them, the concept of place value and comparing. In the end of the chapter we find out more about millions and an introduction to multiples of 10, 100 and 1000.

The third chapter is all about multiplication. After briefly revising the concept and the times tables, the focus is on learning multi-digit multiplication (multiplication algorithm). The children also learn why it works when they multiply in parts (partial products). We also study the order of operations again, touch on proportional reasoning, and do more money and change related word problems.

The last chapter in part A is about time, temperature, length, weight and volume. Students will learn to solve more complex problems using various measuring units and to convert between measuring units.

In part B, we first study division. The focus is on learning long division and using division in word problems. In geometry, we first revise area and perimeter, and then concentrate on the topic of angles. Students measure and draw angles, solve simple angle problems and classify triangles according to their angles. They also study parallel and perpendicular lines.

Fractions and decimals are presented last in the school year. These two chapters practise only some of the basic operations with fractions and decimals. The focus is still on conceptual understanding and on building a good foundation towards 5th grade math, where fractions and decimals will be in focus.

When you use these books as your only or main mathematics curriculum, they can be like a "framework," but you do have some liberty in organizing the study schedule. Chapters 1, 2 and 3 should be studied in this order, but you can be flexible with chapters 4 (Time and Measuring) and 6 (Geometry) and schedule them somewhat earlier or later if you so wish. Chapter 3 (Multiplication) needs to be studied before long division in Chapter 5. Many topics from chapters 7 and 8 (Fractions and Decimals) can also be studied earlier in the school year; however finding parts with division should naturally be studied only after mastering division.

Please also see the table of contents for 4-A and 4-B in the sample file, which will let you see a detailed list of the topics covered.

"...One of our favorite parts of Math Mammoth is that it is so easy to understand, your child can literally teach themselves. There is no teacher’s book that forces parents to spend hours reading aloud boring material. Instead, each lesson has a short section that the kiddos can read on their own. "
Tiffany at Homeschool Hideout blog


Here is a list of manipulatives that are needed or recommended for grade 4. Measuring tapes are only used in the measuring chapter.

  1. A protractor (for 4-B).
  2. A ruler that measures in centimetres (for 4-A and 4-B).
  3. A measuring tape that measures in metres (for 4-A).
  4. Fraction manipulatives. The curriculum contains printables to make your own fraction manipulatives. The text uses visual pie models extensively, and students even learn to draw them for themselves in the exercises, therefore making or buying the manipulatives is entirely optional (optional; for 4-B).

Reviews & testimonials

Review of Math Mammoth by mommybugg238

Review of Math Mammoth from You've Got This Math (focusing on MM grade 4)

Hi Maria, I'm writing to thank you for Mammoth Math, Grade 4! I realized in November that my fifth grader had learned virtually no math in her fourth grade year, when her school was mostly remote due to COVID. The COVID learning loss is real, and a lot of the concepts in fourth grade math, like problem solving, time and measurement, and beginning to develop a sense of fractions and decimals, just can't be skipped over. We did two pages a night, about six nights a week, plus two pages in the morning on most weekends and holidays. It took us a little under six months to complete the Level 4 Light Blue Series, and I'm thrilled to let you know that my daughter has mastered the material. We are going on to Level 5, and I expect she'll be fully caught up and ready to go just as she starts sixth grade. Thank you for creating such a high-quality and simple-to-use math curriculum!!

I just wanted to say that my kids and I are really enjoying the curriculum. They are finishing up the 4th grade (light blue) course right now. I love how everything is broken down. Things are really clicking for my twins. I have one child that picks up on concepts rather quickly, and one for whom academics are always a struggle. Well, several times throughout the year I've heard her say, "I actually get this." You have no idea how happy that makes me. I'm glad I decided to purchase the bundle, so the next few years of math are covered.Thank you.

Gabrielle Frazier
Just finishing Chapter 2 of Math Mammoth 4th grade. Love the open and go format. So many extras are included in the bundle--reviews, additional problems to work, websites for fun practice on each topic. Really well-designed curriculum.

Also, prior to buying we had our kids do placement tests with Math Mammoth and an online curriculum with a comic book-based text. They were in tears and very resistant, but they love Math Mammoth!"

- Nicole H, Co-op Member
September 2020
I just wanted to tell you that I just moved my son from Horizons math to your Math Mammoth. Mostly because I wanted a mastery-type curriculum and yours was highly rated and also suggested by Math Without Borders. He is doing so well with it and it's hard to believe that just after a few weeks his mental math has improved incredibly. He loves the workbook and the games are excellent and has been a great motivator for him. Engineering is in his future so I wanted to hit math hard this year to prepare him for Math without Borders.

Thank you so much for all of your emails and care taken with your curriculum. He will be getting a Mammoth stuffed animal for Christmas!!

A happy homeschooling mom (Allisha)

September 2017

"Math Mammoth utilizes color in their books. This is a HUGE bonus in my opinion. It can be very monotonous to stare at page after page of black and white numbers, especially for little ones. Things like the fractions you see here are so much more interesting, and easier to explain when you have color designations."

Read the full review by Heidi at Starts at Eight blog

September 2016
New to home schooling, I felt overwhelmed trying to pick out a suitable curriculum to suit a 1st and 4th grader (in particular), having come through regular school up to 3rd grade. Both kids are enjoying Math Mammoth so far. The hints and tips for mental math throughout are great. The program provides flexibility if a student is struggling on something because I can hop back and print out some 3rd grade reminders of key concepts. I love that I can generate extra worksheets of different problems online anytime - brilliant. We haven't got far enough yet to use the chapter reviews but glad that they are there for us when we're ready. The pricing through homebuyers is amazing to cover both students through 8th grade if we so choose. I chose to do the download option and print as we go. I would recommend this product (and a good printer!)."

- Claire L, Orlando, Co-op Member
September 2016
I've been using Mammoth for 3 years now. I teach fourth grade and my students love it! They can work as ability allows and now I actually have to buy the 6th grade program for some of my higher students who have breezed through 4th and 5th grade math!

May 2015

How and where to order

You can buy Math Mammoth International Version:

  • As a digital version on this site ( — using the "Add to cart" buttons.
  • As a print version at Lulu. Follow the links from this site to Lulu.

Also available:

Math Mammoth Grades 1-3 Bundle, International Version, $83 USD

Get grades 1-3 in a discounted bundle — 35% off! This means you save $44.50 USD.

Add to cart

Math Mammoth Grades 4-7 Bundle, International Version, $110 USD

Get grades 4-7 in a discounted bundle — 35% off! This means you save $60 USD.

Add to cart

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

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


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Math Mammoth Tour

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

An initial email to download your GIFT of over 400 free worksheets and sample pages from my books. Six other "TOURSTOP" emails that explain the important things and commonly asked questions concerning Math Mammoth curriculum. (Find out the differences between all these different-colored series!)

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"Mini" Math Teaching Course

This is a little "virtual" 2-week course, where you will receive emails on important topics on teaching math, including:

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- Should you use timed tests
- And more!

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Note: You will FIRST get an email that asks you to confirm your email address. If you cannot find this confirmation email, please check your SPAM/JUNK folder.

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