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The school held the track and field games. 32 people participated in the fourth grade and 126 people participated in the sixth grade, 6 less than the total number of people in the fourth and fifth grades, Equation!
Suppose there are x people in Grade 5, 2 (32 + x) - 6 = 126 64 + 2x = 126 + 6 2x = 132-64 2x = 68 x = 34 A: there are 34 people in Grade 5 who take part in the checking calculation: 2 (32 + 34) - 6 = 64 + 68-6 = 13
There are three numbers a, B and C. the number a is one third of the sum of B and C, the number B is one second of the sum of a and C, and the number C is the sum of a, B and C
The total number of a and C is 1 / 4
B is 1 / (2 + 1) = 1 / 3 of the total
C is 1-1 / 4-1 / 3 of the total number = 5 / 12
There are 48 students in class 1 of grade 5, planting 99 trees in total, and 42 students in class 2 of grade 5, planting 126 trees in total
(99 + 126) / (48 + 42) = 2.5 ≈ 3 trees
Each of the two classes planted three trees on average
A, B and C jointly process 180 parts. The number of parts processed by a is half of that processed by B and C, and the number processed by B is one third of that processed by a and C. how much does C process
A accounts for all = 1 / 2 (1 + 1 / 2) = 1 / 3
B = 1 / 3 (1 + 1 / 3) = 1 / 4
C = 180 × (1-1 / 3-1 / 4) = 75
The number of a is half of that of B and C, and a accounts for 1 / 3 of the total
B processes one third of a and C, and B accounts for 1 / 4 of the total
So C is:
180x(1-1/3-1/4)
=180x5/12
=75
A processes 1 / 2 of the total number (1 + 1 / 2) = 1 / 3
Party B processes 1 / 3 of the total number (1 + 1 / 3) = 1 / 4
So 1-1 / 3-1 / 4 = 5 / 12 of the total
So 180 × 5 / 12 = 75 pieces
Have a good time
There are 180 students in the fifth grade, 15 more in the sixth grade than in the fifth grade,
Explain the reason carefully
180×5/9+15
=100+15
=115
A: there are 115 students in grade six
Three people of a, B and C process 180 parts, one-half of that of B and C, and one-third of that of a and C. how much do three people process?
I'm a child. Can I use a simple way that I can understand.
180 * 1 / (1 + 2) = 60 (pieces) ···· a
180 * 1 / (1 + 3) = 45 (pieces) ···· B
180-60-45 = 75
A: 60
B: 45
C: 75
180/3=60___ nail
180/4=45___ B
180-60-45=75__ C
180/3=60___ nail
180/4=45___ B
180-60-45=75__ C
Let a be x, B be y and C be Z
X=1/2(Y+Z)
Y=1/3(X+Z)
X+Y+Z=180
The solution is x = 60, y = 45, z = 75
2x=y+z
3y=x+z
x+y+z=180
There are 180 students in the fifth grade, 15 more than 5 / 9 of the sixth grade. How many students are there in the sixth grade?
Math master answer, because I saw others and I the same question, but the answer is different, please master answer
(180-15) △ 5 / 9 = 165 × 9 / 5 = 297 (person)
There are three numbers a, B and C. the known number a is one fifth of the sum of the two numbers B and C. the number B is one half of the sum of the two numbers a and C. the number C is 30. What are the two numbers a and B?
A is the total number: 1 / 5 (1 / 5 + 1) = 1 / 6
B is the total number: 1 / 2 (1 / 2 + 1) = 1 / 3
C is total: 1-1 / 6-1 / 3 = 1 / 2
The sum of the three numbers of a, B and C is 30 △ 1 / 2 = 60
A: 60 × 1 / 6 = 10
B: 60 × 1 / 3 = 20
There are 120 students in grade five, 25% more in grade six than in grade five,
120 * (1 + 25%) = 150 (persons)
There are three numbers a, B and C. B knows that a is the sum of two numbers B and C, 1 / 5. B is the sum of two numbers a and C, 1 / 2. C is 30. What are the two numbers a and B?
There are three numbers a, B and C. B knows that a is 1 / 5 of the sum of the two numbers B and C, B is 1 / 2 of the sum of the two numbers a and C, C is 30. What are the two numbers a and B?
Total 30 △ 1-1 / (1 + 5) - 1 / (1 + 2)]
=30÷【1-1/6-1/3】
=30÷1/2
=60
A 60 × 1 / (1 + 5) = 60 × 1 / 6 = 10
B 60 × 1 / (1 + 2) = 60 × 1 / 3 = 20
RELATED INFORMATIONS
- 1. There are 120 students in grade five, three more than 10 / 9 of the students in grade six. How many students are there in grade six
- 2. The number of books on the upper shelf is 105 more than that on the lower shelf. After taking 25 books from the upper shelf to the lower shelf, the number of books on the lower shelf is four fifths of that on the upper shelf?
- 3. There are 3000 books on the two bookshelves of a and B. two fifths of the books on the first bookshelf are 420 more than one fourth of the books on the second bookshelf How many copies? Solve the equation once It's better to use the formula method
- 4. There are two bookshelves A and B. the first bookshelf has 120 books. If you take 24 books from the first bookshelf to the second bookshelf, the 23 books in the second bookshelf is exactly 75% of the first bookshelf. How many books did the second bookshelf have?
- 5. There are two bookshelves. 14 books in bookshelf A is equivalent to 25 books in bookshelf B, and there are 120 more books in bookshelf a than in bookshelf B______ Ben
- 6. There are two bookshelves, a and B. There are 600 books in a bookshelf, one third of which are borrowed from a bookshelf After lending 1 / 6 of the books from bookshelf B, the number of books on bookshelf A is 100 more than twice that on bookshelf B. how many books are there on bookshelf B?
- 7. There are two bookshelves of science and technology books in the library of the school. If one fifth of the books on the first bookshelf are put into the second bookshelf, the number of books on the two bookshelves is equal. If the first bookshelf has 100 books, how many books on the second bookshelf?
- 8. There are two layers of books on the shelf, a total of 144. If you take out eight books from the lower layer and put them on the upper layer, the number of books on the two layers will be the same. How many books are there on the upper and lower layers of the shelf?
- 9. Take out 10% of the books on shelf a and put them on shelf B. the number of books on both shelves is the same. How many more books on shelf a than on shelf B?
- 10. There are several books on each shelf. If you take five books from shelf B and put them on the fake shelf, the books on shelf a will be four times more than those on shelf B. If you take five books from shelf a and put them on the coat hanger, the books on shelf a will be three times as many as those on shelf B. how many books are there on shelf a and B?
- 11. There are 12 more boys in class 6 than 25 in the whole class, and the ratio of boys to girls is 2:1?
- 12. There are 1458 students in a middle school. Among them, the number of female students is 20% less than that of male students. How many are there for male and female students?
- 13. The ratio of male to female students was 6:5. Later, the number of female students increased by 5, and now the number of female students is 8 / 9 of that of male students?
- 14. The ratio of boys to girls in class 6 (1) is 11 to 10. Given that there are 22 boys, how many girls are there and how many students are there in the class
- 15. There are 150 students in the dance class of the children's palace and 126 students in the quyi class. The number of students in the quyi class is () less than that in the dance class,
- 16. The school chorus has 40 people, 2 less than 3 times of the dance team. How many people are there in the dance team
- 17. If 30 people are transferred from team a to team B, the number of the two teams is equal; if 10 people are transferred from each team, the remaining number of team B is 25% of the remaining number of team A. how many people are there in each team?
- 18. If 30 people are sent from team a to team B, the ratio between team a and team B will be 3:2. How many people are there in each team?
- 19. The ratio of the number of the two construction teams is 7:3. If 30 people are sent from team a to team B, the ratio is 3:2. How many people are there in the two construction teams
- 20. The ratio of team a and team B is 7:8. If 30 people are sent from team a to team B, then the ratio of team a and team B is 2:3. How many people are there in team a and team B?