The calculation to be learned in elementary school can be solved in 5 seconds, seven tools of arithmetic himets, multiplication multiplication ratio can be all mental arithmetic.

Publisher: Kankuki Publishing
Author: Akitonton
size:
Number of books: 1
Language: Japanese
Category: Learning / Reference Book
Latest release date: 2023-12-20

Synopsis:
Class videos have exceeded 400 million! "How to solve 99 × 99 without calculation?" "76%of 25?" "If you divide 51/68?"
Malteen, multiplication, fractions approximately about the number of fractions.
If you read this book, you will be able to do this.


? The number can be divided in 5 seconds
? The percentage can be calculated in 5 seconds
? 4 4
? The squirrels from 1 to 1000 can be solved in 5 seconds
? 3 You can mental arithmetic
? 19 × 19 can be mental arithmetic
You can solve 99 x 99 without a calculation

Because it can be started with kiso's kiso, both children and adults can learn happily and improve their computational skills!
Mathematics calculations are increased, as well as increasing arithmetic scores!