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The ratio of male workers to female workers in a workshop was 5:2, and then 21 male workers were transferred to another workshop. Now the ratio of male workers to female workers is 4:3. How many female workers were there in this workshop? (answer clearly, help me understand the idea, I can add 30) try not to solve the equation, I'm only a sixth grade student
I have taught students in Grade 6. They must be able to solve simple equations! Don't be afraid of difficulties! Let's set female employees as y people. Originally, the number of male employees is 5 / 2 (5 / 2, i.e. 2.5 times) of that of female employees. Now, the number of male employees is 4 / 3 times (i.e. a little more than 1 times) of that of female employees. Why
The original ratio of male workers to female workers in a workshop was 3:2. Later, two male workers were transferred. The ratio of male workers to female workers was 8:5
Less male workers?
The number of girls remained unchanged
It turns out that male workers are female workers: 3 △ 2 = 3 / 2
Now male workers are female workers: 8 △ 5 = 8 / 5
There are 20 female workers: 2 ÷ (8 / 5-3 / 2)
The original number of male workers: 20 × 3 / 2 = 30
Detailed analysis, help to understand, my first purpose
Gaining experience and wealth is our second goal
If you don't understand my answer, please ask me!
The original ratio of male workers to female workers in a workshop was 5:6, and then a male worker was transferred from other places. At this time, the number of male workers was just 87.5% of the number of female workers. How many people are there in this workshop now?
The number of female workers: 1 ^ (87.5% − 56) = 1 ^ (78 − 56), = 1 ^ 124, = 24 (people); the number of male workers: 24 × 87.5% = 24 × 0.875, = 21 (people); the total number of male and female workers: 24 + 21 = 45 (people); a: there are 45 people in this workshop now
The fast train and the slow train leave each other from a and B. at present, the fast train takes 1 / 5 and 11 kilometers of the whole journey, and the slow train leaves. When they meet, the slow train takes 2 / 7 of the whole journey
It is known that the speed of fast and slow cars is 4:5, so the distance between two places can be calculated
The ratio is wrong. It's 5:4
Fast to slow ratio 4:5?
If the slow train runs 2 / 7, the fast train should run 2 / 7 * 5 / 4 = 5 / 14,
Then 11km accounts for 1-5 / 14-2 / 7-1 / 5 = 1 / 70
11 / (11 / 70) = 70 km
When the local train starts to meet, the local train takes 2 / 7 of the whole journey, and the express train takes 2 / 7 * 5 / 4 = 5 / 14 of the whole journey
Set the whole process as S
be
11=（1-1/5-2/7-5/14）S
S=70
Let the distance between the two places be x, the fast speed be 5A and the slow speed be 4a
Then the equation 2x / 7 / 4A = (5x / 7-x / 5-11) / 5A is established
That is, 10x / 7 = 20x / 7-4x / 5-44
44=10X/7-4X/5
X=70
The number of people in workshop a is 140 more than that in workshop B, and that in workshop B is 20% less than that in workshop A. how many people are there in workshop a and workshop B?
140 △ 20% = 700 (person) 700-140 + 700 = 560 + 700 = 1260 (person) answer: there are 1260 people in the two workshops
A and B buses leave from the two places and meet at 30 kilometers away from the midpoint five hours later. How many kilometers does the fast train travel per hour and the slow train travel per hour?
(60 × 5-30 × 2) △ 5 = (300-60) △ 5 = 240 △ 5 = 48 (km) a: the local train runs 48 km per hour
A and B start from two cities at the same time and meet 40 meters away from the destination. B's speed is 5 / 6 of a's. how many meters are the two cities apart
Don't you know the time?
If car a has more distance than car B, and car B has more time than car a, what is the speed ratio of two cars
If the distance of car a is 1 / 4 more than that of car B, then the distance of car a = (1 + 1 / 4) the distance of car B = 5 / 4, the time of car B is 1 / 4 more than that of car a, then the time of car B = (1 + 1 / 4) the time of car a = 5 / 4, the speed of car a: the speed of car B = (5 / 4 △ 1): (1 △ 5 / 4) = 25:16
There are 140 people in workshop a of a factory, and the number of people in workshop B is 20% less than that in workshop A. how many people are there in workshop a and workshop B
The number of people in workshop B is 20% less than that in workshop a
It shows that the number of B = the number of a x (1-20%) = 0.8 times of A
Therefore, the total number should be:
Number of workshop a + number of workshop B
140x (1 + 1-20%) = 140x1.8 = 252 persons
The number of people in workshop B is 20% less than that in workshop a
He said that Bijia workshop should be regarded as unit one
It shows that the number of B = the number of a x (1-20%) = 0.8 times of A
Therefore, the total number should be:
Number of workshop a + number of workshop B
It's the second floor
The number of people in workshop B is 20% less than that in workshop a
He said that Bijia workshop should be regarded as unit one
It shows that the number of B = the number of a x (1-20%) = 0.8 times of A
Therefore, the total number should be:
Number of workshop a + number of workshop B
You don't want the answers, just list them
140x(1+1-20%)= ？
The two cars leave from a and B at the same time. After 5 hours, they meet at a distance of 30 kilometers from the midpoint. How many kilometers does the fast train travel per hour and the slow train travel per hour?
RELATED INFORMATIONS
- 1. The ratio of male to female workers in a workshop is 8:5. Later, 20 female workers were transferred in. At this time, the number of female workers is 3 / 4 of that of male workers. How many workers are there in this workshop?
- 2. In a workshop, the ratio of male workers to female workers is 5; 6. Later, a male worker was transferred from other places. At this time, the number of male workers is just 87.5% of the number of female workers. How many people are there in total
- 3. There are 52 workers in a workshop, and then four women workers are transferred in. At this time, the number of women workers is 34 times that of men workers. How many women workers are there in this workshop?
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- 11. There are 450 workers, 36% of whom are women workers. Another batch of women workers have been added, accounting for 40% of the total number of workers. How many are there?
- 12. There are 2400 workers in a factory, of which 5 / 8 are female workers. Later, several new female workers were recruited. At this time, the number of female workers accounts for 2 / 3 of the total number of workers?
- 13. The number of male workers in a workshop is twice that of female workers. If 18 male workers are transferred, the number of female workers is twice that of male workers. How many female workers are there in this workshop?
- 14. The number of male workers in a workshop is twice that of female workers. If 21 male workers are transferred, the number of female workers is twice that of male workers. How many female workers are there?
- 15. There are 240 workers in a factory, 58 of them are women workers. Later, several women workers are transferred in. At this time, women workers account for 2029 of the total number. How many women workers are transferred in?
- 16. There were 240 workers in a factory, of which women accounted for two fifths. Later, some women workers came in, so that the number of women workers accounted for three fifths of the total number, How many female workers are transferred in?
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- 18. The number of female workers in a workshop accounts for 3 / 8, and then four female workers are recruited. At this time, the number of female workers accounts for 4 / 9 of the total number of workers. There are () workers in this workshop
- 19. There are 45 workers in a workshop, of which the ratio of male workers to female workers is 3:2. Later, how many male workers are recruited, and now male workers account for 16 / 25 of the total number, and more male workers are recruited?
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