One of the math assignments tonight is hundreds of millions of grains of rice. Hard working parents urge their children to finish it. 'so, how much is 100 million grains of rice? For teachers, it's just a simple assignment. I don't know how much is 100 million grains of rice?
The teacher assigned 100 million grains of rice
On September 6, it was reported that "one of the math homework items tonight is hundreds of millions of rice grains. Hard working parents urged their children to finish it. Recently, a netizen published a post on the "Hupu forum" titled "homework assigned by primary school teachers: hundreds of millions of rice grains at home, and brought back to school, what level?" which aroused netizens' heated discussion and thousands of replies. Tiewen said that in the group, children with friends were in the fourth grade of primary school, and then received a 'special' assignment, that is, hundreds of millions of rice grains at home, packed with food bags the next morning and brought back to school, and asked parents to urge.
How much is 100 million grains of rice
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"Students, do you know how much 100 million grains of rice weigh?" when the teacher asked this question, some students said without hesitation: 'a bowl of rice is heavy.' some said: 'a bag of rice is heavy. 'I said:' 100 million grains of rice weigh more than one jin, enough for an adult to eat for one day '& hellip; & hellip; after listening to our answer, the teacher smiled and said:' let's do an experiment together in this class to see who's right, OK? '
We took out the prepared rice, and in the group of four, we carefully picked out 1000 grains of good quality rice. After several times of weighing on the balance, the weight was about 20 grams.
Then in the group, we calculated that the mass of 100 million grains of rice is about 2000 kg, that is, 2 tons.
At this time, some students asked: "teacher, how much is two tons?" to solve this problem, the teacher led us to Qiaotou grain store with a calculator. We asked: 'how much is a bag of rice?' the aunt of the grain store told us: '25 kg of rice is a bag. '
According to this calculation, 2000 kg rice can be packed in 80 bags. 'Wow! How so many!' I exclaimed. My aunt smiled at my voice and said: 'look! This pile of rice is about 80 bags. "We counted it carefully again, and measured that it was about 3 meters long, 1.4 meters wide and 1.5 meters high, accounting for more than six cubic meters.
Back in the classroom, the teacher asked us the second question: 'under normal circumstances, how many people can eat a day's rations per adult based on 600 grams of rice per day? Based on these data, what other questions can you ask?'
Through calculation, our group calculated that about 3333 people could eat one day, and some groups calculated that 100 million grains of rice could be enough for one person to eat for more than nine years. Wow, the whole class made another exclamation!