Current location - Training Enrollment Network - Mathematics courses - Mathematical method for counting 10000 grains of rice
Mathematical method for counting 10000 grains of rice
Divided into 10 grains of rice 1 group, so the maximum number of groups is 1000, and so on, 100 grains of rice 1 group can be calculated, which is the most commonly used method.

10000 grains of rice weigh 200 grams, and the weight of each grain of rice is equal to 200 grams divided by 10000 grains is equal to 0.02 grams per grain. That is, the weight of 1 grain of rice is 0.02g. ..

The weight of 1 100 million grains of rice is 1 100 million grains multiplied by 0.02 grams, and each grain is equal to 2 million grams. 1 kg equals 1000 g, and 2 million divided by1000g equals 2000 kg. So 10000 grains of rice weigh 200 grams, and 100000 grains of rice weigh 2000 kilograms.

Introduction of weight unit

The unit of weight has a long history. In ancient times, all countries had their own units of measurement. China ancient unit of weight, Jun: 30 kg is one jun; A dozen guineas weigh one baht, 24 baht, 12 pounds.

China has specific units of measurement, such as international kilograms and tons, American and British pounds and so on. There is no "Jin" in the international standard unit, which is a unit in China. Secondly, units such as "Jin" and "kg" obviously belong to the units of weight in physics, but they are by no means units of mass. Please make clear the difference between quality and weight.

Thirdly, from the perspective of law and life, Chinese law clearly stipulates that units such as "Jin" and "kg" can be used as quality units in various occasions, and quality = weight, which is legally equivalent and has legal effect.