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Description
Pluses and Minuses: How Math Solves Our ProblemsA guide to changing how you think about numbers and mathematics, from the prodigy changing the way the world thinks about math. We all know math is important: we live in the age of big data, our lives are increasingly governed by algorithms, and we're constantly faced with a barrage of statistics about everything from politics to our health. But what might be less obvious is how math factors into your daily life, and what memorizing all of those
A guide to changing how you think about numbers and mathematics, from the prodigy changing the way the world thinks about math. We all know math is important: we live in the age of big data, our lives are increasingly governed by algorithms, and we're constantly faced with a barrage of statistics about everything from politics to our health. But what might be less obvious is how math factors into your daily life, and what memorizing all of those formulae in school had to do with it. Math prodigy Stefan Buijsman is beginning to change that through his pioneering research into the way we learn math. Plusses and Minuses is based in the countless ways that math is engrained in our daily lives, and shows readers how math can actually be used to make problems easier to solve. Taking readers on a journey around the world to visit societies that have developed without the use of math, and back into history to learn how and why various disciples of mathematics were invented, Buijsman shows the vital importance of math, and how a better understanding of mathematics will give us a better understanding of the world as a whole. Stefan Buijsman has become one of the most sought-after experts in math education after he completed his PhD at age 20. In Plusses and Minuses, he puts his research into practice to help anyone gain a better grasp of mathematics than they have ever had.Binding Type: Paperback
Publisher: Penguin Group
Published: 08/25/2020
ISBN: 9780143134589
Pages: 208
Weight: 0.35lbs
Size: 7.90h x 5.30w x 0.60d
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★★★★★ 5
Passport wallet
Perfect for travel and daily life .Holds everything you need and has extra room for ID, driver's license, etc..zipper closure. Love it.
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Reviewed in the United States on December 11, 2025
★★★★★ 5
Convenient for international travel
The Amazon Basics Travel Passport Wallet Organizer is an essential tool for any traveler seeking organization and security. Designed with practicality in mind, this wallet excels at holding passports securely, ensuring that your most important document is always accessible and protected. This is particularly useful for families or groups traveling together, as it can accommodate multiple passports without becoming cumbersome.
One of the standout features of this organizer is its ability to keep any receipts you may accumulate on your journey. This is incredibly handy for customs, where having a record of your purchases can streamline the process and prevent any unnecessary delays. The wallet's multiple pockets are thoughtfully designed, providing organized sections not just for receipts, but also for boarding passes, credit cards, and even a pen—making it a comprehensive travel companion.
The quality of the Amazon Basics Travel Passport Wallet Organizer is apparent in its durable material and sturdy construction, promising longevity and resilience against the rigors of travel. Its compact size allows for easy storage in a carry-on bag or backpack, yet it doesn't sacrifice space or functionality.
In summary, the Amazon Basics Travel Passport Wallet Organizer is a reliable, well-designed product that addresses the needs of modern travelers. Its capacity to securely hold passports, organize receipts for customs, and provide multiple pockets for various essentials makes it an invaluable asset for anyone looking to travel with ease and efficiency.
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Reviewed in the United States on March 7, 2024
★★★★★ 5
Great Value
Good quality, great value! A little big for my use.
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Reviewed in the United States on January 5, 2026
★★★★★ 5
The most complete, compact wallet I've ever seen!!
This is the most complete, compact wallet I have ever seen, there is a space for everything, even coins. I ordered 2, one for me and one for him. Mine does not fit in my purse, it's 10 inches long. I'm debating, should I return mine or keep it. I've searched for one similar, less than 10 inches, and found nothing. He is so excited and happy, he has already filled his up. This is the only wallet one needs AND it's RFID blocking.
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Reviewed in the United States on March 18, 2026
★★★★★ 5
I was skeptical at first going from a regular wallet to this but I'm very happy with it
Color: Coffee6227, Material Type: Leather
Very good quality wallet very durable so far so great, has a place for everything, business cards, a spare key, place for cash and your debt and credit cards stay very secure and locked in place and slide out very easy when you need it I highly recommend it
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Reviewed in the United States on April 17, 2026
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