1.(Huangdao at the end of August, 2020) In order to respond to the call of "keeping China people's rice bowls firmly in their own hands", ensure food security, optimize varieties and increase yield, an agricultural science and technology group conducted a comparative study on the experimental planting of two maize varieties, A and B. This year, ...
2 1 Century Education Network
An agricultural research institute conducted a comparative experiment on two kinds of corn, A and B, at eight experimental sites. The yield per mu of these two kinds of corn in each experimental site is as follows: (unit: kg)
An agricultural research institute conducted a comparative experiment on two kinds of corn, A and B, at eight experimental sites. The yield per mu of these two kinds of corn in each experimental site is as follows (unit: kg): A: 450, 460, 450, 430, 450, 460, 440, 460 B: 440, 470, 460, 440. ...
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20 13 Jiangxi civil service examination quantity relationship exercise 20_ Jiangxi civil service examination network
2. Stores spend the same money to buy two different kinds of sugar, A and B. It is known that A kind of sugar is 6 yuan per kilogram and B kind of sugar is 4 yuan per kilogram. If these two kinds of sugar are mixed together to form assorted sugar, what is the cost per kilogram of this assorted sugar? A.3.5B.4.2。 C.4.8D.53 Someone ...
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It is known that two kinds of food *** 100 kg, and among the options, only A+D=25+75= 100 kg, so the BC option can be directly excluded. So whether to choose A or D, and then according to the meaning of the question, "A will reduce the price by 20% and B will increase the price by 20%", both the price reduction and the price increase are 20%, but the final total value is higher than this. ...
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Two kinds of food * * * 100kg. Now, the price of food A has decreased by 20%, and the price of food B has increased by 20%. After the adjustment, the prices of both A and B foods are 9.6 yuan per kilogram, which is less than the original 140 yuan. How many kilograms is food A? A.25 kg B.45 kg C.65 kg D.75 kg is correct. ...
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From "the current price of food A is reduced by 20%, the price of food B is increased by 20%, and the adjusted prices of food A and food B are both 9.6 yuan per kilogram", we can know that the original price of food A is *( 1-20%)=9.6, that of food A is = 12, and that of food B is * (1). ...
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Baidu education
Someone bought two kinds of fruits, and the A-type fruit bought 3 kilograms more than the B-type fruit to take to 44 yuan. It is known that a kind of fruit is 3 yuan per kilogram, and B kind of fruit is 4 yuan per kilogram. How many kilograms did this man buy? Answer analysis solution: suppose this person bought a class. ...
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Career compilation, exams, answering skills, guessing questions, to help you solve the problem of quantitative relationship _ Yixian. com
In the recruitment examination of public institutions, through some simple calculation methods, such as divisible feature method, proportional method, special value method, mantissa method, etc., the answers to mathematical operation questions can be quickly obtained. But there is also a quick way to solve the problem, using the relevance of the options to get the answer. many ...
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A village planted one hectare of corn A and another hectare of corn B, with a total output of X kilograms; The planting area of rice is 2b hectares less than that of corn, and the total output of rice is y kilograms less than that of corn. ...
The yield per unit area of corn is: x/(a+b) = x (a–b)/[(a+b) (a–b)] = (a–b) x/(a2–B2) (kg/ha); The yield per unit area of rice is: (2x–y)/(a–b) = (2x–y) (a+b)/[(a–b) (a+b)] = (2x–y) (a+b)/ ...
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Someone bought two kinds of fruits, and the A-type fruit bought 3 kilograms more than the B-type fruit to take to 44 yuan. It is known that a kind of fruit is 3 yuan per kilogram, and B kind of fruit is 4 yuan per kilogram. How many kilograms did this man buy? Answer analysis solution: suppose this person bought a class. ...
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The sixth grade store bought two different kinds of fruit candy, A and B, and the cost ratio was 2: 1. It is known that the sugar A is 24 yuan per kilogram and the sugar B is 8 yuan per kilogram. If two kinds of sugar are mixed together to form assorted sugar, how much is it per kilogram of assorted sugar?
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B The range of corn is 470-430 = 40kg. So the first kind of corn is relatively stable. Variance can also be used to compare which corn is stable. S A 2= 100，S B 2=200。 S2 < S2, so the yield of corn is stable.
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There are two bags of corn, and the mass of the first bag of corn is 1.8 times that of the second bag. If you put 80 kilograms of corn from bag A into bag B, there will be as many as two bags.
If you put 80 kilograms of corn from bag A to bag B, there will be as many bags as there are. How many kilograms are there in each bag? Write the equivalence relation first, and then use the equation to solve it. (1.8 times B bag -80kg)-(B bag +80kg) =0 Solution: Let the corn in B bag have x kg. 1.8x-80-(x-80)=00.8x ...
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There are two plots, the first one is m mu, planted with one kilogram of corn, and the second one is n mu, planted with one kilogram of corn, so the average yield of corn per mu in these two plots is () Baidu knows.
Answer: 4
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3. There are two kinds of sugar with the same weight in the store, namely 10 yuan 2kg sugar A and 10 yuan 1kg sugar B. In order to save trouble, the clerk mixed the two kinds of sugar and sold them together, 10 yuan1.5kg. Only after they were sold out did they find that the price was lower than that of 60 yuan. ...
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Two cotton fields, A and B, have an average yield of 185 kg per mu, A cotton field has 5 mu, with an average yield of 203 kg per mu, B cotton field has an average yield of 170 kg per mu, and how many mu is B cotton field?
Jiang Zhiyao assumes that the average yield per mu of field B is 185*(5+x) kg, and the total yield of fields A and B is 203*5+ 170*x kg. Equation185 (5+x) = 203 * 5+170 *.
Cheese answer
Weight of two bags of corn * * * 182kg. If 1/8 is taken out of bag A and put into bag B, and the two bags weigh the same, how many kilograms are these two bags of corn? Yulu learned to help each other.
1- 1/8×2=3/4 A package:182 ÷ (1+3/4) =104 kgb package:182-
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There are two bags of corn, the weight of which is 1.8 times that of the second bag. If you take 80kg from the first bag and put it in the second bag, the weight of the two bags is the same, then how much is there in each bag?
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There are two bags of corn, the mass of which is 1.8 times that of the second bag. If you take 80kg from the first bag and put it in the second bag, the two bags will weigh the same. Originally, there were two bags of corn each, and the mass of the first bag of corn was 1.8 times that of the second bag. If you take 80kg from the first bag and put it in the second bag, the two bags will weigh the same. ...
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140kg a rice yield 9 1 kg, b rice yield100kg. If two kinds of rice weigh the same, which one yields more rice? At present, A and B rice are 1200 kg respectively. What is the total output of rice? ...
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An agricultural research institute conducted a comparative experiment on two kinds of corn, A and B, at eight experimental sites. The yield per mu of these two kinds of corn in each experimental site is as follows: (unit: kg)
An agricultural research institute conducted a comparative experiment on two kinds of corn, A and B, at eight experimental sites. The yield per mu of these two kinds of corn in each experimental site is as follows (unit: kg): A: 450, 460, 450, 430, 450, 460, 440, 460 B: 440, 470, 460, 440. ...
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Two kinds of food * * * 100kg. Now, the price of food A has decreased by 20%, and the price of food B has increased by 20%. After the adjustment, the prices of both A and B foods are 9.6 yuan per kilogram, which is less than the original 140 yuan. How many kilograms is food A? () A.25 kg B.45 kg C.65 kg D.75 kg ...
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It is known that two kinds of food *** 100 kg, and among the options, only A+D=25+75= 100 kg, so the BC option can be directly excluded. So whether to choose A or D, and then according to the meaning of the question, "A will reduce the price by 20% and B will increase the price by 20%", both the price reduction and the price increase are 20%, but the final total value is higher than this. ...
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The maize production information of a farm A and B is as follows: The land is divided into two groups according to natural conditions.
The data of corn yield in A and B of a farm are as follows: The land is divided into two groups according to natural conditions: total sown area (ton) unit area (ton) total sown area (ton) unit area (ton) absolute number (hectare) proportion (%) absolute number (hectare) proportion (%) mountainous hilly plain. ...
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