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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
Think of grade six as unit one
So the number of sixth grade students is (120-3) / (9 / 10) = 117 / (9 / 10) = 130
A, B and C plant trees. The number of a is 12 times that of B and C, and the number of B is 13 times that of a and C. It is known that C has planted 260 trees. How many of a and B?
12 + 1 = 13, 13 + 1 = 14; 260 ^ (1-13 − 14), = 260 ^ 512, = 624 (trees); 624 × 13 = 208 (trees); 624 × 14 = 156 (trees); answer: there are 208 tree species A and 156 tree species B
There are 280 students in the sixth grade, one sixth more than in the fifth grade,
280 ／ (1 + 1 / 6) = 280 ／ 7 / 6 = 240 people
A, B and C plant trees. The number of a is 12% of the sum of B and C, and the number of B is 13% of the sum of a and C. It is known that 130 trees have been planted, then a is planted______ &A tree
The sum of tree species a, B and C: 130 △ 1-11 + 2-11 + 3, = 130 △ 512, = 312 (trees); tree species A: 312 × 11 + 2 = 312 × 13 = 104 (trees); answer: a planted 104 trees
There are 126 students in the three classes. Class three is 8 less than class one, and class two is 4 more than class three. How many students are there in class two
There are three classes with X people
One class has x + 8, two classes have X + 4
x+x+8 +x+4=126
X = 38
38 + 4 = 42
A, B and C three people plant trees. A is half of B, C and B, and a third of a, C and B. 130 trees are known to be C, and how many trees are a?
Suppose x trees are planted in a, then the number of trees in B is 2x-130. From the question 3 (2x-130) = x + 130, we can get x = 104
Therefore, x + (2x-130) + 130 = 3x = 312 trees were planted
There are 126 students in grade five, with an average of 13 trees per person, and 203 students in grade six, with an average of 18 trees per person
203*18-126*13
=3654-1638
=2016
13x+18y=126+208
I'm the same as my roommate below
203*10-126*13
126x13 = 1638 203x18 = 3654 3654-1638 = 2016 A: there are 2016 fewer trees planted in grade five than in grade six.
Did you learn division and subtraction?
203 × 18-126 × 13 = 3654-1638 = 2016
Obviously it's a brush
There are three kinds of trees in a, B and C, one half of B and C and one third of B and B. 130 trees are known to be planted in C, a and B
A 104. B 78
The number of books from the upper shelf to the lower shelf is 105, which is five times more than that from the upper shelf,
How many books were there on the top shelf?
Suppose there are x books
(X-25)*4/5=X-105+25
4X/5-20=X-80
0.2X=60
X = 300, 300 in the upper layer and 195 in the lower layer
A, B, C and D planted 60 trees in total. The number of trees planted by a was 12 times that of the other three. The number of trees planted by B was 13 times that of the other three. The number of trees planted by C was 14 times that of the other three. How many trees did Ding plant?
60 × (1-11 + 2-11 + 3-11 + 4), = 60 × (1-13-14-15), = 60 × 1360, = 13 trees; answer: Ding Zhishu 13 trees
RELATED INFORMATIONS
- 1. 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?
- 2. 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
- 3. 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?
- 4. 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
- 5. 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?
- 6. 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?
- 7. 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?
- 8. 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?
- 9. 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?
- 10. There are 102 books in a and B bookshelf, 24 of which are taken from a and put into B. two thirds of B's bookshelf is exactly three fourths of a's bookshelf, and B's original books speed
- 11. 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!
- 12. There are 12 more boys in class 6 than 25 in the whole class, and the ratio of boys to girls is 2:1?
- 13. 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?
- 14. 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?
- 15. 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
- 16. 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,
- 17. The school chorus has 40 people, 2 less than 3 times of the dance team. How many people are there in the dance team
- 18. 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?
- 19. 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?
- 20. 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