Coins have one cent, two cents, five cents, ten cents,
And there are no three hairs, four hairs, six seven eight nine hairs.
(Wumao can also refer to people - water army, the recent price increase is close to eight cents)
(Every ten into one, ten hairs is a piece)
This is because in the 10 natural numbers of 1 to 10,
There are "important numbers" and "non-important numbers".
1, 2, 5, 10 are "important numbers",
These numbers can be used with the least addition or subtraction to obtain other numbers.
For example, 1+2=3, 2+2=4, 1+5=6,
2+5=7，10-2=8，10-1=9。
If you put these four 'important numbers'
Any number is replaced by a 'non-important number',
It will be that the existing number must be added or subtracted more than twice to get it,
Inconvenient for daily use.
In cases where both 1 and 2 hairs already exist,
It can be completely combined into other denominations such as three cents and four cents.
Only the second set of renminbi in China has a "three yuan" denomination.
In 1950 began planning and design, in 1953 began to plate making and printing,
It was a period when China was learning from the Soviet side in an all-round way.
So in this respect also borrowed the denomination system of the ruble.
(Soviet rubles often used the denomination of "three", with three-gobies of coins and three-ruble banknotes.) ）
Jianghu Ya called "Su San Coin"
With the development of the country's economy, prices have also risen,
The denomination of RMB issuance has changed accordingly, resulting in a further increase in the utilization rate of RMB 10.
Becoming the main body of currency circulation transactions, the frequency of 2 yuan used is further reduced.
Accordingly, on June 30, 1999, Order No. 268 of the State Council decided to cancel the issuance of RMB 2.
Due to the lower and lower frequency of banknotes with 2 yuan and 2 corners denomination, in order to save printing and plate making costs,
At the same time, the denomination structure of the renminbi was made more reasonable, and the Chinese Bank decided to stop the issuance.
The 1 yuan coin on the market is the most widely used banknote, and it is also the most basic banknote.
It can be composed of 2 yuan, 3 yuan and other face values, and the unary combination is converted into the most simple.
(If you want to buy 4 yuan of things, you just need to give the boss 5 yuan, and the boss will find you 1 yuan,
It is not necessary to use two sheets of 2 yuan to form 4 yuan for the boss).
Since 1 yuan, 5 yuan, 10 yuan can be changed in this way, but also in order to save printing and plate making costs,
So: 2 yuan is not necessary to print again.
Now there is no two hairs, two yuan, (twenty yuan is still there)
Two is also very rare
From the perspective of probability: in the various permutations and combinations of numbers from 1 to 9,
The probability of 3 appearing is only 18% at most,
The overall probability of 1, 2, and 5 occurring is 90%.
If you use a "3" denomination currency,
The probability of presenting in circulation is about 16.7%,
Proof that a currency with a face value of "3" is in actual circulation
The role of change substitution is not significant,
On the contrary, it will make the face structure of the currency feel unbalanced.
Money has no three cents, and people have three cents!
Three hairs for men and women,
Male Sanmao and female Sanmao are often wandering!
The age of male sanmao is relatively young,
When I was a child, I looked at his diary, just a few paintings, and I didn't need too many words.
I smiled first, and then I felt some bitterness in my heart,
Laughter with tears, it is really high-level humor!
Female Sanmao is the standard Wenqing,
When she was a child, she read all the world's famous books on the market, and she also liked to write.
Literary attainments are extraordinary, although self-effacing works are only worth thirty cents.
But her math grades were really not good.
So don't like the inequality Cauchy, like the bearded Jose.
Sanmao and Jose
The picture shows Sanmao at the Chengdu Tea House,
Drinking tea and picking your feet is very pleasant
Don't ask me where I'm from
My hometown is far away
Why wandering
Wandering far away