A few elementary school math problems, urgent, heavy money!!!! Add 30 before 1112!

1. This is a large area --- a small area problem.

From the figure, we know that this is a trapezoid, trapezoidal area formula = (upper bottom + lower bottom) height 2 The blank part is a right triangle, and the characteristic of a right triangle is that the length of one side of the right angle = the length of the other side.

In the figure, 6 = 6, that is, 6 is the height of the trapezoid.

6+8) 6 2=42 (cm2) This is the area of the trapezoid.

The area of the triangle: the height of the base 2 6 6 2=18 (cm2) 42--18 = 24 (cm2) is the area of the shadow.

It's 400.

540 is 54 out of 1000

3. Set the name of the lady x according to the question column: 500 = 3 5x + 54, the first question cannot be easily calculated The second question 2 3 (4 5--2 3) = 2 3 4 5--2 3 2 3

5. The line chart should be used, because the line chart can not only reflect the number but also see the change trend.

Have a nice day!!

1. Because it's a square, that's how it is; 6*6 2+[8-6]*6 2=24cm2, but there is less than a triangle in the square, so the outside of the square is added into the square, that is; 6*6/2=18cm2。

2. Whoever is a fraction of whom, divide who by whom, 540 400=, 540 1000=, you should understand the principle of decimal percentage, I won't explain it.

3. Calculate back, 5 more than female employees, subtract 5 from the known 500 male employees, and the number obtained is 3 5 of female employees, then the formula is; [500-5] Three-fifths = the number of female employees.

4. I don't know and don't bother to think about it, I hate simple calculations the most.

5. The line chart can best reflect the changes in a set of data, answers; Line charts.

1) If the large figure is trapezoidal, the shadow area = (6 + 8) 6 2 -42 - square centimeters).

2) 540 is 400 (135)%540 is 1000 (54)%3) Number of female employees = (500-5) 3 5 = 825 (person) 5) A province statistics of the recent influenza A (H1N1) epidemic requirements can not only know the number of sick people per day, but also reflect the trend of the epidemic situation (bar chart).

The first question is incomplete, and there should be a question stem in the question or picture.

Question 2: 135, 54

Question 3: 500-x 3 5=5

Question 4: The first sub-question.

Question 2: Last question: Line chart.

1. (6+8)x6 2-1 4xpi (6 squares) = 42-9pi = 400x100% = 125%; 540 1000x% = 54%3, (500-5) three-fifths = 825

x8-12x15÷15=368-12=356 ;There's nothing to calculate, just do it.

5. The whole province is sampling.

1.The picture is not clear, please draw it clearly.

3.There are x number of female employees.

The equation can be listed by the meaning of the title 500= -5

One question is not very clearQuestion 2: 135% Question 3: (500+5) 3/5 Question 5: Line chart.

1.Is the shaded part a triangle?

3.There are x number of female employees.

3/5）x+5=500

5。Line charts.

The area of the shaded part does not know how high?

Find the least common multiple of 3,4,5 first, which is 3*4*5=60

Add two more to the remaining two, which is 60 + 2 = 62

The equation is 3*4*5+2=62

Explain that this number minus 2 is a common multiple of , that is, a multiple of 60, less than a hundred, then this number can only be 62.

Can you say it completely? I don't really understand the landlord's question.

First subtract two of the number, so that it is an integer multiple of 3,4,5, 3*4*5=60, add two, 62.

1. A piece of plasticine, use it to make a cube with an edge length of 1 cm, which can be made into 32. Use this plasticine to make a cube with a volume of 8 cm (4) pieces.

2. Fill in the blanks: electricity consumption, water consumption, electricity expenses, and water expenses.

January 40 15 33

February (20-28 (44).)

March 50 (18) (28).

April 60, 25 (55).

3. True/False.

The circumference of the rectangle is fixed, and the length and width are inversely proportional (wrong).

The product qualification rate is certain, and the total number of pieces is proportional to the qualified product (right).

The number of people is certain, and the male and female are inversely proportional (wrong).

The radius of the circle is not proportional to the area (right).

The weight is certain, and the rest is proportional to what is used (wrong).

4Fill in the blanks: February 50, 44, March 28, 18, April 55

Judge right right right or wrong right.

The circumference of the lake is 1 kilometer 8 equal parts, each equal point is counted as a section, the rabbit has jumped 3 sections after a break, and has jumped 12 sections after 4 breaks, exactly a week and a half, and the 4th break is exactly at point A, so it passes through a special passage to point B, and the circumference of the lake becomes 2 kilometers at this time; We divided the new lake into 16 sections, and now the bunny rested to 4 2 = 8 times, and jumped a total of 8 3 = 24 segments (a week and a half) before resting at point A ,......And so on, the rabbit rested to 16 times, 32 times, 64 times, 128 times, 256 times, 512 times, ,......The little rabbit just happened to rest at point A

When the bunny has 7 breaks that happen to be at point A, the number of bunny breaks is:

4 8 16 32 64 128 256 508 1000 When the rabbit has 8 breaks that happen to be at point A, the number of times the rabbit rests is:

4 8 16 32 64 128 256 512 1000So when the rabbit rests 1000 times, it has not yet rested at point A for the eighth time, so the circumference of the rabbit when it rests 1000 times is the circumference of the 7th break exactly at point A and then slides to point B, that is, the circumference of the radius of the lake when it doubles for the seventh time.

Because every time the radius is doubled, the circumference of the circle also doubles, so

The circumference of the first doubling of the radius of the lake is: 2 1 km = 2 km The circumference of the second doubling of the radius of the lake is: 2 2 km = 4 km The circumference of the third doubling of the radius of the lake is:

2 4 km = 8 km The circumference of the 4th doubling of the radius of the lake is: 2 8 km = 16 km The circumference of the 5th doubling of the radius of the lake is: 2 16 km = 32 km The circumference of the 6th doubling of the radius of the lake is:

2 32 km = 64 km The circumference of the 7th doubling of the radius of the lake is: 2 64 km = 128 km Answer: After the rabbit rests 1,000 times, the circumference of the lake is 128 km

First of all, if you jump 4 times, if you want to jump 1 km, you have to jump 8 times, if you jump 16 times for 2 km, and if you jump 32 times for 4 km, then when you jump 64 km, you need 512 times, adding up to 1020 times, and at this time, it is 64 km*2=128

Copy from the title, (8 8 + 4 8) (3 8) = 4, free child rest 4 times, reach point a, this bai when the radius expands du is doubled, the circumference is 2 kilometers, at this time (16 8 + 8 8) (3 8) = 8, at this time the radius is doubled, get (dao32 8 + 16 8) (3 8) = 16 times, we will find that the free child has to jump one and a half times to reach point a, so the number of breaks should be doubled each time, 4 + 8 + 16 + 32 + 64 + 128 +256 512 = 1008 times 1000, and at 4 times, the lake is 1 km, and at 8 times it is 2 km, so it is 128 km at 512 times, so when the rabbit rests 1000 times, the lake is 128 km.

Is there such a difficult topic in elementary school?

Original = 2 * (first banquet 1 2003 + 1 2004 + 1 2005 + 1 2006) + (1 2003 + 1 hall resistance 2004 + 1 2005) * (1 2003 + 1 Zhe Fuyin 2004 + 1 2005 + 1 2006) - 2 * (1 2003 + 1 2004 + 1 2005) - (1 2003 + 1 2004 + 1 2005 + 1 2006) * (1 2003 + 1 2004 + 1 2005).

Solution: 1 set the original ** as x yuan, then the ** after the reduction in early April is 2 3x yuan.

Now 60 yuan to buy pork, if you buy according to the original **x yuan, 60 yuan to buy 60 x catties of pork, according to the downward ** to buy, you have to buy 60 divided by the following **2 3x is equal to 60 (2 3x) catties of pork, and because the number of catties of pork bought after the reduction is two catties more than the original ** bought pork, so the equation is: 60 x + 2 = 60 (2 3x) solution x = 15 yuan catty.

The answer requires the ** after the reduction, so the ** after the reduction is 2 3x = 10 yuan catty.

2》Because the title tells that pork ** rebounded in May and June, so the average growth rate in May and June is y, then there is 10 (1+y) (1+y) =, and the solution is y = so the average growth rate is 20%.

(1) Dissolution, the original pork ** is x yuan, and the ** in April is 2 3 x yuan.

2/3 x）*（60/x+2）=60

40+4/3 x=60

x=152 3 x=10 yuan.

2) Eliminate the average growth rate y

10*（1+y）^2=

1+y)^2=

1 + y = y = A (1) In early April, pork ** was lowered by 10 yuan per catty.

2) The average monthly growth rate of pork** in the month is 20%.

Solution: 1) Set x yuan per catty, then there are: 60 x - 60 ( x 2 3) )2

Solution x = 10

2) Average monthly growth rate = - 10) (10 * 2) * 100% = 22%.

Set the original price to $x.

60/（2x/3）=60/x+2

x=154 months ago: 15 yuan.

Before April Mid-April: 10 RMB.

June: Set the average monthly growth rate to y

10*(1+y)^2=

y = average monthly growth rate of 20%.