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📚 | Rough calculation will make you smarter?Ultra-high-speed calculation technology to acquire logical thinking


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Does a rough calculation make you smarter?Ultra-high-speed calculation technology to acquire logical thinking

 
If you write the contents roughly
In this book, we will take a closer look at "how to get rough numbers" and its fun, which are important skills for living.
 

"How many cats are there in the world?" "How many adult hairs are there?" "How many words are in your favorite book?" → Continue reading

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