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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
25 / 14 = 85, 85-1 = 35120 / 35 = 200 (copies); answer: there are 200 books in B bookshelf
Party A, Party B and Party C jointly process 180 parts. The number of parts processed by Party A is 1 / 2 of that of Party B and Party C, and the number processed by Party B is 1 / 3 of that of Party A and Party C. how many parts has Party C processed?
Use arithmetic
The number of a is 1 / 2 of that of B and C, and 1 / (1 + 2) = 1 / 3 of that of A
The number processed by B is 1 / 3 of that of a and C, and 1 / (1 + 3) = 1 / 4 of the total number processed by B
1-1 / 3-1 / 4 = 5 / 12
C processed 180x5 / 12 = 75 pieces
C: 180X (1-1 / 3-1 / 4) = 75
B + C = 180 (1 + 1 / 2) = 120
A = 120 × 1 / 2 = 60
A + C = 180 (1 + 1 / 3) = 135
C = 135-60 = 75
The number of a processed is 1 / 2 of that of B and C, so a processed 60. (180 / 3)
B processes 1 / 3 of a and C, so B processes 45 (180 / 4)
So C processed 180-60-45
180 ÷ (1 + 1 / 2) = 120
120 × 1 / 2 = 60
180 ÷ (1 + 1 / 3) = 135
135-60 = 75
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
25 / 14 = 85, 85-1 = 35120 / 35 = 200 (copies); answer: there are 200 books in B bookshelf
Party A, Party B and Party C jointly process 180 parts. Party A processes 1 / 2 of Party B and Party C, Party B processes 1 / 3 of Party A and Party C, and Party C processes parts
How many?
A: 180 (1 + 2) = 60
B: 180 (3 + 1) = 45
C: 180-60-45 = 75
1. There are two bookshelves. Two fifths of the books in bookshelf a are equal to one fourth of that in bookshelf B. bookshelf a has 120 fewer books than bookshelf B. how many books are there in each bookshelf
2. The number of peach trees in the orchard is one fifth less than that of pear trees. How many more pear trees than peach trees?
3. The sand on the construction site is 6 tons more than the cement. After two days, the remaining mass is equal. It is known that there are 2 / 7 sand left and 8 tons of cement left. How many tons of original sand?
Use the formula method, not the equation
1. There are two bookshelves. Two fifths of the books in bookshelf A is equal to one fourth of bookshelf B. bookshelf a has 120 fewer books than bookshelf B. the number of books in each bookshelf is 8 / 5 of bookshelf A. therefore, the number of books in bookshelf a = 120 △ 3 / 5 = 200, and that in bookshelf B = 200 × 8 / 5 = 320
A, B and C process a total of 180 parts. The number of parts processed by a is 1 / 2 of that of B and C, and the number processed by B is 1 / 3 of that of a and C,
The number of parts processed by C is 5 / 7 of that of a and B. how many parts have three people processed
The solution of 2x = y + Z 3Y = x + Z x + y + Z = 180 is x = 60, y = 45, z = 75
The number of books on the first bookshelf is three times more than that on the second bookshelf by 50. If 150 books are added on each bookshelf, the number of books on the first bookshelf is twice that on the second bookshelf. How many books are there on each bookshelf
There are x books on shelf a and Y books on shelf B
x=3y+50
x+150=2(y+150)
The results of solving binary linear equations
x=350
y=100
There are 350 books on shelf a and 100 books on shelf B
A: there are 350 books on shelf a and 100 books on shelf B
That's it. Two equations and two results should be enclosed in braces
Party A, Party B and Party C jointly process 1825 parts. It is known that it takes 3 minutes for Party A to process one part, 3.5 minutes for Party B to process one part, and 4 minutes for Party C to process one part. When the task is completed, how many parts will each be processed?
1825 ÷ (13 + 13.5 + 14) = 1825 △ 7384 = 2100 (minutes) 2100 × 13 = 700 (pieces) 2100 × 13.5 = 600 (pieces) 2100 × 14 = 525 (pieces) answer: A has processed 700 parts, B has processed 600 parts, C has processed 525 parts
There are 1175 books in a and B bookshelves. If 150 books are taken out of each bookshelf, the remaining books in a bookshelf are 1.5 times of those in B bookshelf. How many books are there in a and B bookshelf?
The remaining two bookshelves: 1175-150 × 2 = 875 (copies); the remaining two bookshelves: 875 △ (1.5 + 1) = 350 (copies); the remaining one: 350 × 1.5 = 525 (copies); the original one: 525 + 150 = 675 (copies); the original one: 350 + 150 = 500 (copies). Answer: the original one is 675 (copies); the original one is 500 (copies)
Party A, Party B and Party C jointly process 1825 parts. It is known that it takes 3 minutes for Party A to process one part, 3.5 minutes for Party B to process one part, and 4 minutes for Party C to process one part. When the task is completed, how many parts will each be processed?
1825 ÷ (13 + 13.5 + 14) = 1825 △ 7384 = 2100 (minutes) 2100 × 13 = 700 (pieces) 2100 × 13.5 = 600 (pieces) 2100 × 14 = 525 (pieces) answer: A has processed 700 parts, B has processed 600 parts, C has processed 525 parts
RELATED INFORMATIONS
- 1. 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?
- 2. 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?
- 3. 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?
- 4. 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?
- 5. 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?
- 6. 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
- 7. There are two bookshelves. There are 600 books in bookshelf a, one third of which are borrowed from bookshelf a, and three fourths of which are borrowed from bookshelf B. after that, there are 150 more books on bookshelf a than two times of those on bookshelf B. how many books are there in bookshelf B?
- 8. Party A, Party B and Party C work together to process a batch of parts. Party A makes 20% of the total number of parts, and Party B makes 120. The ratio of the number of parts made by Party C to that made by Party B is 5:6 How many?
- 9. A total of 735 parts can be manufactured by a, B and C at the same time, How many did they build each
- 10. A, B and C workers make 876 parts at the same time. It takes 3 minutes for a, 3 minutes for B and 4 minutes for C to make a part. How many parts have they made?
- 11. 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?
- 12. 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
- 13. 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?
- 14. 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
- 15. 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!
- 16. There are 12 more boys in class 6 than 25 in the whole class, and the ratio of boys to girls is 2:1?
- 17. 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?
- 18. 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?
- 19. 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
- 20. 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,