For a commodity, the price first increases by 1 / 5 and then decreases by 1 / 5. The current price is 120 yuan per piece. What is the original price

For a commodity, the price first increases by 1 / 5 and then decreases by 1 / 5. The current price is 120 yuan per piece. What is the original price

The original price is 120 / ((1 + 1 / 5) * (1-1 / 5)) = 125 yuan
Note: / is a division sign and * is a multiplication sign

The price of a commodity will be increased by 1 / 5 first, and it will be the same as the original price when it is reduced
Please say the reason! Why!

If you increase the price of a commodity by 1 / 5, it will be the same as the original price when you reduce the price by 1 / 6
After raising the price, it becomes 6 / 5 of the original price, so it's OK to reduce it by another 1 / 6

If the current price of a commodity is 100 yuan, first reduce the price by 1 / 10, and then increase the price by 1 / 10, compared with the original price, is it increased or decreased, or unchanged? Calculate the original price
To calculate the steps, you don't have to solve the equation,

Let the original price be X
X*90%*110%=99%X
That is to say, 99% off the original price
It's one percent cheaper
Current price 100
Original price: 101
I haven't done the math problem for a long time
Step: 100 / 1.1 / 0.9 = 101
Just count it backwards~

How much is the current price of a 100 yuan item, which is reduced by 10% and then increased by 10%?

100 × (1 + 10%) × (1-10%) = 100 × 1.1 × 0.9 = 110 × 0.9 = 99 yuan; answer: the current price is 99 yuan

Answers to the 12 pages of the sixth grade mathematics homework

The first question is 1 188.4 244.92 282.6 2 questions 157 3 questions 72 24 4 questions 3.14 5 questions 36 the second question is 2 No. 3 s side 12.56 * 5 = 6.28 s bottom 2 * 2 * 3.14 = 12.56 s table 62.8 + 12.56 = 75.36 v = sh = 2 * 2 * 3.14 * 5 = 62.8 the third question is large volume is v = sh = 2 * 2 * 3.14 * 5 small volume

The annual interest rate of a three-year treasury bond is 3%. When Mr. Li bought 5000 yuan of such treasury bonds, he could get () yuan of interest after maturity. (interest tax exemption)
A furniture manufacturer calculated the cost of a certain type of furniture as 800 yuan, planned to make a profit of 20%, and the seller planned to make a profit of 10%. How much yuan should the seller specify the selling price?
When an enterprise imports a production line with a value of 2.2 million yuan, it should pay tax at the rate of 15%. Because it fails to pay tax as scheduled, it has to pay overdue fine when paying the tax. In this way, the enterprise should pay 33198 thousand yuan of tax and overdue fine. What percentage of the overdue fine should be paid?
A clothing factory produces 500 sets of clothing in January, and plans to produce 600 sets of clothing in February, so as to find the production growth rate in February. If the monthly growth rate is the same, how many sets of clothing is expected to be produced in March?

The annual interest rate of a three-year treasury bond is 3%. Mr. Li bought a treasury bond of 5000 yuan, which can earn interest when it matures
5000x3% X3 = 450 yuan

Six answers to English homework

UNIT 1 How Tall Are you?
1. Listen and draw
(1) Smiling face (2) crying face (3) smiling face (4) crying face (5) smiling face (6) smiling face
2、Look,choose and writer.
(1)Chen jie Mike Tom
(2)Tom Mike Chen jie
(3)older younger
(4)shorter taller
That's all for now
Hope to adopt, typing is very lucky and bitter!

Uncle Wang bought 3000 yuan of treasury bonds in 2007, with a fixed term of three years. The annual interest rate of the three-year treasury bonds is 5.74%. (1) since he can buy treasury bonds without paying 5% interest tax, how many yuan can Uncle Wang avoid paying interest tax? (2) How much money can Uncle Wang get back when it's due?

(1) (2) principal and interest: 3000 + 3000 × 5.74% × 3, = 3000 + 516.6, = 3516.6 (yuan). Answer: Uncle Wang can get back 3516.6 yuan when due

Six answers to English homework on page 50 and 51
That's the second question on page 50 and the third question on page 51,

The first box all adds Er directly, the second box the first three directly add s, go --- goes, have --- has, clip --- clips, the third box: Dance --- danced, take --- tool, do --- did, go --- went, see --- saw, fly --- fly, the fourth box: swim --- swamming, leave --- le

Uncle Wang bought 3000 yuan of treasury bonds in 2007, with a fixed term of three years. The annual interest rate of the three-year treasury bonds is 5.74%. (1) since he can buy treasury bonds without paying 5% interest tax, how many yuan can Uncle Wang avoid paying interest tax? (2) How much money can Uncle Wang get back when it's due?

(1) (2) principal and interest: 3000 + 3000 × 5.74% × 3, = 3000 + 516.6, = 3516.6 (yuan). Answer: Uncle Wang can get back 3516.6 yuan when due