102×4.5 7.8×6.9+2.2×6.9

5.6×0.25 8×(20- 1.25)

Second, calculate the following questions.

2.95×5.4 1.43×0.67 (the number shall be kept to two decimal places. )

6.84 ÷ 0.36 ÷ 7.9 ÷ 0.35 (the number is kept to two decimal places. )

Third, solve the following equation.

3x-48 = 72 5.9x-2.4x = 7 x÷2.6 = 0.8

Fourth, fill in the form.

1. In other words, the cyclic decimal 0.72727 ... is ().

Xiaolan has a black rabbit, two of which are three times more than black rabbits. Raise () a white rabbit.

The base of an isosceles triangle is 15cm, the waist is a cm and the height is b cm. The circumference of this triangle is () cm and the area is () cm 2.

The area of parallelogram is 33.6 cm, and its base is 8.4 cm. Its height is () cm.

5. The median of this set of data in the table below is (), and the average is ().

172 146 140 142 140 139 138 143

6.

5. Calculate the area below.

6.( 1) The four knitting machines of Yimei Company knitted 2227m colored rope in 8.5 hours. How many Besty ropes can each knitting machine weave per hour on average?

(2) Yimei Company wants to weave Chinese knots with these colored ropes. Each Chinese knot needs 3.6 meters of colored rope. How many Chinese knots can this batch of colored ropes knit at most?

Seven, two paving teams at the same time from both ends of the construction of 2070 meters road. Team A lays 46 million eggs every day, while Team B lays 44 million eggs every day. How many days can this road be paved?

8. The number of visitors to the Science and Technology Museum last month reached 6.5438+0.378 million, of which children's audience was 654.38+0.6 times that of adults. How many children and adults visited the Science and Technology Museum last month?

Nine, Xiaoping and Xiaoling play military chess, and decide who will play first by touching playing cards. They chose four playing cards, two of which were hearts and the other two were spades. Put four playing cards, face up, and each person draws a card. If the cards drawn by two people are of the same color, Xiaoping plays chess first; If the colors are different, Xiaoling plays chess first. Please answer the following questions:

(1) The possibility of finding two cards of the same color is ().

(2) The possibility that two cards have different colors is ().

(3) Are the rules of the game fair? ( )。

First, fill it out.

1, 120 hectares = () square kilometers 5.64 hectares = () square meters.

456,000 square meters = () hectares 1.2 square meters = () square centimeters.

8 square meters = () square decimeter = () square centimeter

2. The base of a triangle is 3.6 decimeters, the height is 4.8 decimeters, the area of the parallelogram with the same height as the base is () square decimeters, and the area of this triangle is ().

3. The trapezoid has an upper bottom of 18cm, a lower bottom of 22cm, a height of 15cm and an area of () cm2.

4. The base of parallelogram is 12cm, the area is 96cm2, and the height is () cm.

5. Two identical triangles form a parallelogram with a base length of 8.5 cm and a height of 6 cm. The base of this triangle is () and the height is ().

6. Draw the parallelogram into a rectangular frame with a perimeter of () and an area of ().

7. The area of a trapezoid is 16 square decimeter, the upper bottom is 3 decimeters, the lower bottom is 5 decimeters, and the height is () decimeters.

8. The base of the parallelogram is expanded to twice the original, and the area is () times under the condition of constant height.

9. The base of a triangle is 5cm, and its height is twice that of the base, so its area is ().

10, the area of an isosceles right triangle is 32 square centimeters, and the length of its right side is () centimeters.

Second, distinguish one.

1, two identical trapezoids can be combined into a parallelogram. ( )

2. Two triangles have the same area and the same shape. ( )

3. The area of triangle is equal to half the area of parallelogram. ( )

4. The length and width of the rectangle increased by 3cm and 5cm respectively, and the area increased by 15cm. ( )

5. The perimeter and area of a square with a side length of 4 cm are equal. ( )

6. The larger the base of the parallelogram, the larger the area. ( )

7. The perimeters and areas of two regular triangles are equal. ( )

8. Two right-angled triangles with three sides of 3 cm, 4 cm and 5 cm respectively. The perimeter of the parallelogram formed by these two figures must be 16 cm. ( )

9. The upper bottom of the trapezoid is expanded to twice the original size, while the lower bottom and height remain unchanged, and its area will be expanded to four times the original size. ( )

10, two triangles with equal areas, their bases and heights are not necessarily equal. ( )

Third, choose a choice.

1. The upper and lower bottoms of the trapezoid are expanded to three times of the original, and the height and area remain unchanged ().

A. expand to six times the original

C. Expand to 9 times of the original, unchanged

2. The height of the parallelogram is ()

A. 1 clause b.2c. numerous clauses d.4.

3. The height of the trapezoid is 4 cm, and the area is increased by increasing the upper and lower bottoms by 6 cm respectively ()

A.6 cm2 B. 12 cm2 C.24 cm2

4. Triangle and parallelogram have the same area and height. Given that the base of a triangle is 20 cm, the base of a parallelogram is ().

A.20 B. 10/0cm C.40cm.

5. What is the relationship between the areas of the two parallelograms in the picture below ()

a . s 1 > s2bs 1 < s2c . s 1 = s2d。 Can't compare.

6. The correct formula for calculating the following graphic area is: ()

a . 10×20 b . 14×20 c . 14× 10

7. The shaded area in the figure below is correct: ()

A.A = D < B < C B. A = B = C = D. D > A = B = C。

8. The two trapeziums of () can be combined into a parallelogram.

A. Same shape B. Equal area C. Arbitrary D. Exactly the same

Fourth, calculate:

1. Calculate the area of each graph below. (Unit: cm)

2. A triangular paddy field is 0.06 hectares with a base length of 40 meters. What is the height of the rice field?

3. The windshield of a car is similar to a parallelogram, with a bottom of 1.6m and a height of 0.8m If 240 yuan is needed for each square meter of tempered glass, how much does it cost to match this windshield?

4. A trapezoidal wheat field with an upper bottom of 76m, a lower bottom of120m and a height of 50m. A * * * harvests 93 10 kg of wheat. How many kg of wheat is harvested per square meter on average?

5. It is known that the circumference of an isosceles triangle is16cm, the waist is 5cm, and the height on the bottom is 4cm. What is the area of this triangle?

6. The school bought a red cloth with a width of 2.4 meters and a height of 384 meters. How many faces can you make to make a red pennant with a base height of 0.8 meters?

The fifth grade first volume mathematics final examination paper

Fill in the blanks.

The greatest common factor of 1, 16, 12 is (), and the smallest common multiple is ().

2. In the natural number 1- 10, the prime number has () and the composite number has ().

3. The minimum three digits of factor 2 and factor 3 are (), and the maximum two digits of factor 3 and factor 5 are ().

4, a kind of light, pull the light on once, and then pull the light off, if pulled 20 times, the light is ().

5. In 40, 5 and 8, () is a factor of (), and () is a multiple of ().

6. The area of a triangle is 36 square meters. If its base is unchanged and its height is doubled, then its area is ().

7. Divide a 5-meter-long rope into 8 segments on average, each segment accounts for () of this rope, and 2 segments are () meters.

8. The sum of three consecutive even numbers is 54, which are (), () and () respectively.

9, a pile of wood, the top layer is 10, each layer below is more than the previous layer 1, * * * has five layers, and this pile of wood * * * has () roots.

10, a number is a multiple of 5, and the sum of the digits on each number is 6. Such two digits are () and ().

Second, the correct judgment is "∨" and the wrong one is "×".

1, the multiple of a number is always greater than its factor. ( )

2. Two parallelograms with equal area, equal base and equal height. ( )

3. The product of two different prime numbers must be a composite number. ( )

4. If the numerator and denominator of a fraction are expanded by four times at the same time, the fraction will be expanded by four times.

In a math exam, the probability that Xiao Ming gets full marks is 1.

Third, choose and write the correct serial number in brackets.

1. If 4()6 is a multiple of 3, () should be filled in.

a、 1、2、3 B、2、4、6 C、2、5、8

2. The bottom of the triangle remains unchanged. If the height is expanded by 4 times, then its area ().

A, expand by 4 times B, expand by 2 times C, which is uncertain.

3. Cut a parallelogram along the height, and you may get ().

A, triangle and trapezoid b, parallelogram and trapezoid

C, two triangles D, two trapeziums

4. Divide the 2m-long rope into 5 sections, each section is ().

a，m，b，c，m

5. Among the following scores, the one that is not the simplest is (

Step 3: Solutions

A, B, C,

Fourth, solve the equation (18 points) x-=+x = 12x-9x = 8.7.

3x — x = 0.9 x — =

2x + 1 = 5 3x+ x =4、8 x — =

It is 2cm, and the length of this line segment is ().

a，4cm B，2cm C，6cm 5。 Solve the problem. (30 points)

1. There is a path with a length of 8m and a width of 1 m on the grass of the parallelogram. Find out the area of the grass.

2. Divide 20 chocolates among 3 people equally. How much will everyone get? What about eight people on average?

3. Two engineering teams, Team A and Team B, built a road with a length of 1 1,400 meters. They started construction at both ends at the same time. Team A builds 80 meters every day, while Team B builds 60 meters every day. How many days will it take to complete this road?

The distance from Huainan to Wuhu is 240 kilometers. At 6: 30 every morning, the bus from Huainan leaves for Wuhu at a speed of 58 kilometers per hour, and the bus from Wuhu leaves for Huainan at a speed of 62 kilometers per hour. When did the two cars meet on the road?

There are () factors of 10 and 30.

A, 4 B, 8 C and 2 125. In the forest sports meeting, the deer and the lamb ran the same distance, and the deer scored and the lamb scored. Who runs faster?

,/。 . five

Fifth, solve the problem. (30 points) 6. A story book, Xiaohong read the whole book on the first day, the whole book on the second day, the sum of the whole book on the third day, and several books on the third day.

1. There is a path with a length of 8m and a width of 1 m on the grass of the parallelogram. Find out the area of the grass.

2. Divide 20 chocolates among 3 people equally. How much will everyone get? What about eight people on average?

3. Two engineering teams, Team A and Team B, built a road with a length of 1 1,400 meters. They started construction at both ends at the same time. Team A builds 80 meters every day, while Team B builds 60 meters every day. How many days will it take to complete this road?

The distance from Huainan to Wuhu is 240 kilometers. At 6: 30 every morning, the bus from Huainan leaves for Wuhu at a speed of 58 kilometers per hour, and the bus from Wuhu leaves for Huainan at a speed of 62 kilometers per hour. When did the two cars meet on the road?

rice

In the forest sports meeting, the deer and the lamb ran the same distance, and the deer scored and the lamb scored. Who runs faster?

6. A story book. Xiaohong finished reading the whole book on the first day, the next day and the third day, which was less than the sum of the previous two days. How many books did she read on the third day?

Give you some difficult application problems to do!

1. Distance between Party A and Party B1800km. A plane flies from A to B at a speed of 360 kilometers per hour. When it returns with the wind, it takes less 1 hour than when it went. How many kilometers does it fly back and forth on average?

2. The distance between Port A and Port B is154km. It took a ship 7 hours and 20 minutes to sail upstream from Port A to Port B, and it only took 4 hours and 40 minutes to sail downstream when it came back. The ship travels between Port A and Port B for an average of 4 hours and 40 minutes per hour. How many kilometers per hour does it travel on average?

Zhang Hua and Li Ming are practicing running on the circular track. At the same time, start from one point and take another road. When they met, Zhang Hua ran 250 meters and Li Ming ran 150 meters. How many meters will Li Ming run to reach the starting point when Zhang Hua reaches it?

4. Xiaotian's home is 3 kilometers away from school, and Xiao Dan's home is 4 kilometers away from school.

Can you determine how far Xiaotian is from Xiao Dan's house?

What is the farthest distance between their two families? How much may it be recently?

Xiaotian's home is in the east of the school, Xiao Dan's home is 3 kilometers south of the school, and then west 1 km. How far is Xiaotian from Xiao Dan's home?