Children's book ④ Cone and volume unit / Shigekatsu Inaba

Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.

Children's Books
[Introduction to the Contents]
In ancient times, mankind lived a life of rising with the sun in the sky, falling down and sleeping.
It is thought that "time" was the first thing that mankind measured at that time.
As the moon became round and narrow in the night sky, they measured time.
Before long, as people hunted and gathered, they began to grow grains.
As the amount of harvest increased, they began to measure "volume" and "weight" to buy and sell them.
In this way, mankind invented various units as needed.
『 : Invention of the "Eye to Scale" Unit! 』 is scheduled to be published in five volumes.
This series explains the various units that we use on a daily basis in cartoons, illustrations, and photographs.
This series helps to deepen understanding of the elementary school arithmetic unit "Unit and Measurement".
[Volume 4] What is the unit of volume? / The space of 1 cubic meter? / The amount of water in 1 liter? / The amount of water in the toilet and bathroom? / The amount of grain and beans is measured by the container! / Umbrella or weight?