Calculation: (1 / 5 + 1 / 9 + 1 / 11) * (1 / 7 + 1 / 9 + 1 / 11 + 1 / 13) - (1 / 5 + 1 / 7 + 1 / 9 + 1 / 11 + 1 / 13) * (1 / 7 + 1 / 9 + 1 / 11) There are three topics, one and two as follows: 1. If you sell a certain commodity at a 20% discount, you can still get a 20% profit. What is the expected profit in the pricing period? 2. For the same commodity, the purchase price of shop a is 10% cheaper than that of shop B, shop a is priced at 20% profit, and shop B is priced at 15% profit. The price of shop a is 11.2 yuan cheaper than that of shop B. how much is the price of shop B? The answer is clear, fast and scored, isn't it To tell you the truth, I didn't understand the answer of the cherry tree, I must be clear, the process can't be less

Calculation: (1 / 5 + 1 / 9 + 1 / 11) * (1 / 7 + 1 / 9 + 1 / 11 + 1 / 13) - (1 / 5 + 1 / 7 + 1 / 9 + 1 / 11 + 1 / 13) * (1 / 7 + 1 / 9 + 1 / 11) There are three topics, one and two as follows: 1. If you sell a certain commodity at a 20% discount, you can still get a 20% profit. What is the expected profit in the pricing period? 2. For the same commodity, the purchase price of shop a is 10% cheaper than that of shop B, shop a is priced at 20% profit, and shop B is priced at 15% profit. The price of shop a is 11.2 yuan cheaper than that of shop B. how much is the price of shop B? The answer is clear, fast and scored, isn't it To tell you the truth, I didn't understand the answer of the cherry tree, I must be clear, the process can't be less

1.1/652.50% set the cost as X, the expected profit = [(20% x + x) / 80% - x] / x = 50% 3. If the purchase price of store B is x yuan, the purchase price of store a is (1-10%) x = 0.9x yuan (1 + 15%) * x - (1 + 20%) * 0.9x = 11.2115% x-108% x = 11.27% x = 11.2x = 11.2 divided by 7% x = 160, then the purchase price of store B is 160

How many Mu is 1115.5 square meters

About 1.67 mu

48 m = () m () cm 5 ha 40 M2 equals () m2
2 and 1 / 4 hours equals () hours () minutes 1.6 square kilometers = () hectares = () square meters

15.48 M = (15) m (48) cm
Five hectares of 40 square meters equals (50040) square meters

How much is a dollar
How much is it

A dollar is ten cents

How much is one yuan equal to

100

How much is one yuan and fifty cents

15 Jiao