★This book has a unique illustration, and stories are full of creativity. The author concretizes an abstract math operations through the interesting story of taming animals, vividly presenting the meaning of math operations and its application rules!

★The author compares the math operations "add 10", "subtract 1", "multiply 4", "divide 2" and so on into savage monsters. The use of flashback first explains the benefits that small monsters will bring to the village by using good algorithms and managing math operations well. Then, the author recalls that when he was a child, the village was subjected to a savage attack of addition, subtraction, multiplication and division. Subtraction made windows, tires and gardens disappear, division made gates and swings become smaller, and multiplication made dogs and kittens become huge. The village fell into chaos, and later "I" used the correct algorithm to tame the monsters such as "subtract 1", "multiply 10", "add 10", "divide 2" and so on, and become a math operations tamer!

The attack made by math operations has changed our village. How to tame “subtract 1” and “multiply 10” ? This interesting book will tell you how do I become a math operations tamer！

I am a math operations tamer, and I keep all kinds of math operations on my farm, including large and small additions, messy subtractions, multiplications and divisions. I also have a lot of special operations, and I put them in the back of the cage.

It is very useful to know the taming rules of math operations. For example, if someone wants to set up a forest in his garden, all he has to do is planting a tree and calling me, and I will take the monsters “add 10”, “add 100”, and even “add 1000”, when I get there, I will let them do a few additions, then a beautiful, lush forest will be set up.

If the forest is small, I just need to bring a "multiply 10" to get it done.

When I was a kid, I didn't want to do this job. But one day, when I knew nothing about mathematics, I had to face a great attack of savage math operations.

The disaster began with a few "add 1" monsters. At first, no one cared too much, because "add 1" could be uncomfortable, but it's cute, and it didn’t require too much math knowledge and math power to control "add 1". But 1 add 1, add 1, add 1, add 1, add 1... Eventually it became "add 10", or even "add 100", and eventually made it difficult to cope.

But the real trouble began with the arrival of subtraction, when four tires of the car disappeared, the door of the home evaporated, five windows flew, and the garden disappeared. Just one “subtract 1” was a big deal. Imagine what it would be like to have a group of “subtract 1”.

Later, the "divide 2" also began to stir, and it made everything twice as small. The gate was twice as small, the trees were twice as small, and the swings were twice as small.

Finally, "multiply 10" made all pets 10 times bigger, including huge cats, 10 meters long puppies, huge birds... All of them ran and screamed wildly…

Can you guess what kind of math operations will the tamers use to tame these terrible monsters? There are unexpected wonderful plots waiting for you to discover!

[Author] Valentine Matter
Valentine is a 35-year-old author and publisher of children's books, he has his own publishing house, La Poule qui pond (The Laying Hen Press). He writes books for children and novels for children with dyslexia. He loves monsters, and his book “Monsters in the City” was translated into Chinese, and another of his books, “Otters Looking for a New Home”, will soon be translated into Chinese. Valentine has a close connection to China, not only because his books have been translated into Chinese, but also he spent time in China when he was a student.

[Illustrator] Olivier Chéna
After graduating from the Ecole Nationale Supérieure des Arts Décoratifs (ENSAD) in Paris, France, Olivier Chéna worked as an interior designer and architect, and also did some 3D graphics related to architecture during these 15 years. In order to reduce his work in front of the screen, he devoted himself to drawing, mainly for the youth field illustration. Nowadays, illustration is his main activity. He collaborates with children's publishers, youth media and publishes his work. He is also involved in the field of music and performance (CD graphicization, festival artworks, etc.). He mainly uses colored pencils and watercolors in his illustrations. His picture book "Be Friends With a Monster Who Eats My Toys~" has been licensed for simplified Chinese translation.