After Uncle Wang finished speaking, he walked to the place where he weighed and asked Zhong Yunfei to carry the weighed out of the room with him, such a weighed Tingting had never seen before, she looked at Qingqing and the madman, they also had a question mark on their faces, it seemed that they had never seen it or would not use it, Zhong Yunfei had no expression on his face, I don't know if it would be?

After Uncle Wang and Zhong Yunfei lifted the scales to the middle of the yard, Uncle asked Tingting to use a few things to try how to use this? Tingting's three girls really don't know how to use it, Tingting has seen the big rod scale of her grandfather's house, which is a big rod scale that can't weigh things, and it needs two people to carry it with a stick, and then a person is looking at the scale, like this I really haven't seen it, so she really doesn't understand how to use it, this is a bit like the scales used in physics experiment classes, as if those iron bumps are weights, but because I don't understand, so Tingting didn't dare to speak, not to mention the madman and Qingqing, their families live in the city, and they haven't seen such a name, Seeing a few girls at a loss for help around this so-called scale, the uncle quickly smiled and said, "Oh, you guys! I saw that I hadn't received a lot of grain at home, this is a good thing, it's very convenient to use it to weigh things, Xiaofei! You've been living here for almost a year, you must be, right? ”

Zhong Yunfei: "Uncle, I really know how to use it, but I don't know how to use that scale, and I can't calculate, I've just seen how you use it!" It's really not good! ”

Uncle didn't tease these children anymore, and began to teach them how to use this scale, because it was still very difficult to move things to scale, so Uncle let everyone stand on the scale, and he explained the use of this scale. Pen | fun | pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

Such a simple rural uncle, but to popularize a knowledge they never know, which makes Zhong Yunfei Tingting a few students really admire this kind and wise old man, the uncle's explanation is: this kind of scale is also called a scale, is composed of a load-bearing plate, a base lever, a scale body, a mechanical scale, a weight-increasing weight, a stone hanging, a measuring rod, a reading device, when weighing, put the items to be weighed on the load-bearing plate, and then move the metering rod back and forth to achieve the balance is the weight of the object, If the object is more than 50 catties, then you need to increase the weight, that is, the similar weight that Tingting just saw, there are 10 catties, 20 catties, 50 catties, 100 catties, 200 catties, the uncle said that the average farmer uses 200 catties to increase the weight is relatively small, let them know how to use it, taught for more than an hour, and finally understood, but only Zhong Yunfei can calculate the weight smoothly, Tingting and several people are still not clear about the number of bars on the scale rod.

Uncle saw that Zhong Yunfei was back anyway, so he asked him to be responsible for teaching Tingting a few girls, he sat on the side and watched, as long as he didn't make mistakes, get used to it!

Tingting saw that the uncle was finally free, and it just so happened that she didn't study anymore, anyway, one of these four people would be fine, she was not sensitive to numbers, so she was very self-aware in this regard, Tingting took out an apple from her backpack, "Uncle, you must be thirsty after teaching for so long, right?" Let's quench our thirst with an apple."

Uncle Wang: "What are you polite about, uncle, don't be thirsty, you can keep it for yourself!" ”

Tingting: "Uncle, this fruit is grown by the fruit farmer I met by chance in the city, it is delicious, you can taste it, I also want to harvest the fruit because I met such a fruit, you taste the taste, see if such a fruit is really good?" ”