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The different series of Math Mammoth books

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Some people feel overwhelmed by the information and all the books offered at Math Mammoth website... and I can understand that.


So, I recently revised the page concerning which books to choose to explain (hopefully) better the different series of books, and to help people choose what they need. :)



Math Mammoth printed books sale

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Get Math Mammoth printed books & CDs at 20% off at Rainbow Resource Center!


This sale runs till January 29, 2018.

Discontented with division?

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Enjoy this column by Steven Strogatz titled Division and Its Discontents.

Division "is the place where many students hit the mathematical wall", he says. Division is mathematically the operation that gives us FRACTIONS... because not everything divides evenly. If you try to divide 9 by 4, you will end up with a fractional part in your final answer.

Strogatz takes us through a few short stories, and in the end shows us some astonishing facts concerning decimals, which make it seem that everything is turning topsy-turvy! Enjoyable piece for adults and your middle and high school students alike. :)

If you'd like more, this piece is actually a part of a series of columns on the Elements of Math:


Get Math Mammoth at 25% off!

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Get Math Mammoth AND Make It Real Learning downloads & CDs at 25% off at MathMammoth.com.

Simply use the "Add to cart" buttons at MathMammoth.com website, and then use the coupon code MMJAN18.

This promotion is valid till January 31, 2018.

Math Mammoth Blue Series - the basics

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This video gives you an overview of Math Mammoth Blue series books:


In case you don't know, the Blue Series books, being topical, are perfect for filling in gaps, to provide additional instruction & review on a certain math topic, or to help a student who is seriously behind to catch up.

There are nearly 50 different books, which cover all math topics for grades 1-7 -- from addition, subtraction, multiplication, and division to fractions, decimals, percents, geometry, equations, statistics, and so on.

Learn more at https://www.mathmammoth.com/blue-series.php !

A new prime has been found (2018)

The GIMPS project has discovered the largest prime to date... it's a Mersenne prime, which means it is of the form 2^n − 1 for some whole number n. ☺

In this case, it is 2^77,232,917 − 1. This number has 23,249,425 digits, and it's nearly one million digits longer than the previous Mersenne prime found.

Read about the discovery here.

The work to find these really large primes is done by running specialized software on many regular computers -- in fact, anyone with a modern computer can help in this project!