Sixth grade Olympiad, if you are good, you will get extra points, the faster the better the score

This year, a total of production:

32400 5 12 77760 (tons).

This year's production is higher than last year's:

1+1 4) Male workers = 430;344 male employees

1-1 4) Female employees = 330;440 female employees

Let's say the book has page A. Rule.

25+2/5(a-25）+9/20a=a

The solution is a=100

So the book has 100 pages.

3 (27 50-26 50) = 150 (person) 150 48 = 72 (person).

A: Now there are 72 girls.

The whole team solved above is worth referring to.

5 months is equal to the output of the previous year, so the remaining 7 months are an increase of 7 5 = 140% with male employee A and female employee B.

a+b+a/4=430

a+b-b/4=330

Subtract the two equations (a+b) 4=100

a+b=400

On the third day, I looked at the remaining 3 5 of the total 9 20

So the rest accounts for 9 20 * 5 3 = 3 4 of the total, that is, the second day, and the third day has a total of 3 4

The first day watched 1 of 4

You can also solve equations.

Three female students were transferred and three male students were transferred, and the total number remained unchanged.

Considering only the boys, there are 3 fewer changes, from 54% to 52%, 2% less, and now the boys are 3*52 2=78

According to the conditions, if the long side of the rectangle is 3x and the short side is 2x, the square of 6x is equal to 96, x = 4.

So the rectangle is 12 long and 8 wide.

From the area of the triangle, the length of the base edge * height 2 = area.

If 1 2 to 1 3 of the long side is the bottom edge, then the area is s=12*1 6*8 2=8

If 1 2 to 1 3 of the short side is the bottom edge, then the area is s=8*1 6*12 2=8

So, the shaded part has an area of 8.

Isn't this a ****?

The shadow part starts from a vertex and connects to its 1 2 and 1 3 respectively?

If the length is 3x, then the width is 2x: then 3x*2x=96x=4 then the length is: 12 and the width is: 8

If you haven't learned square in elementary school:

You can only draw a diagram and calculate it directly. 3x*2x=96 i.e. 6x 2=96, then 1 6x 2=8 is calculated

is the area of the shadow.

First, find the length and width, which are 12 8 cm, and the two right-angled sides of the triangle in the shaded part are 4 4 cm respectively, and the area is 8 square centimeters.

Because the height does not change, the bottom is 1-1 2-1 3 times.

The length and width are 12 8 cm, respectively, and the shaded part has an area of 8 square centimeters.

Question 1 . The 50th day is full of 49 days, which should be half of the 48 days, and 48 days is one-fourth of them. This is not an Olympiad.

Question 2. 17 out of 7 17 7 should be infinitely looping, and it's a good calculation.

Question 3. What does the mulberry tree mean?

1. 48

2.Yes 5, 3 7= 428571 428571... The last 4 digits of 4285 (all periods are 428571 and are cyclical) are 4285. The sum is 334*27+19=9017, and the sum is 9037

x=7 6, 7x+x=8x=28 3, and is 28 3

1. If the average score of the top four students is 150 points, the top four students will score a total of 150*4=600, and the average score of the last 6 students will be 20 points less than the average score of 10 students, a total of 20*6=120 points less. If they achieve the average score, they must borrow 120 points from the top four.

The top four students were borrowed 120 points, and they were reduced to an average score: (600-120) 4=120 (points).

A: The average score of these 10 students is 120 points.

2. Addition of fractions with the same denominator.

3. If a page is not torn off, it is the sum of a series of equal differences.

The formula is: [(1+n)*n] 2=

n is the page number of the last page. Just find a number that is close to 2007.

Suppose [(1+n)*n] 2=2007

1+n）*n】=2007*2=4014

If the parentheses in parentheses are to be ignored, 4014 square is close to n.

The book has a total of 63 pages, and the ninth page has been torn out.

1: If the average score is x, then 10x 4 150 6 (x 20) gives x 120

2: Original (39 86 24) 148 149 148

3: It's wrong to tear the ninth page out of 63 pages, you must know that there are two numbers on one page!

1. There are 20 questions in a mathematics test, and 5 points are awarded for 1 correct question.