Final examination paper

I. Fill in the blanks (20 points)

The product of 1 and 7.56×7.42 has () digits, and the highest digit of the quotient of 136.5÷7.65 is () digits.

2. It is known that the product of two factors is 7.5, one of which is 0. 15 and the other is ().

3. The circulating decimal is 0. 18282 ... The simple notation is (), and the two decimal places are (), which is accurate to one thousandth ().

4. If the number of A is X and the number of B is 7, which is less than 2.5 times that of A, then the number of B can be expressed as ().

5. The base length of the triangle is 7.8 cm, which is longer than the height 1.8 cm. The area of this triangle is () square centimeters.

6. The median of a set of data 4.8, 5.6, 7.2, 7.8 and 9.2 is (), and the average is ().

7.①-⑦ * * 7 cards, insert one card casually, the possibility of odd number is (), the possibility of even number is (), the possibility of greater than 2 is (), and the possibility of greater than 5 is ().

8. put ">" in ○. "<" or "="

678×0.3○678 1.02×0.75○0.75

1.43÷0.9○ 1.43

9. Xiao Fang has a pencil X, and the number of watercolor pens is six times that of pencils, so 6x means (), and 6x+x means ().

10, observing a cuboid, you may see at most () faces at a time.

Second, you are the best! Think it over before you judge. Mark "√" for the right and "×" for the wrong (5 points).

1, 8.7 divided by a number that is not 0, the quotient may be greater than 8.7. ( )

2. Two triangles with the same base and the same height may have different shapes, but their perimeters and areas must be equal. ( )

3. Two trapezoids with equal areas can be combined into a parallelogram. ( )

4. An equation with an unknown number is called an equation. ( )

5,3.8686 is a cyclic decimal. ( )

Three, multiple choice questions (please fill in the serial number of the correct answer in brackets) (10)

1, what is the sum of a and b divided by their difference quotient? The formula is ()

A.(a+b)÷(a-b)b .(a-b)÷(a+b)c . a+b÷a-b

2. Draw a parallelogram made of wood strips into a rectangle, and its area is ()

A. unchanged B. bigger

C. Smaller D. Uncertainty

3. as shown in the figure, the area of triangle a () the area of triangle b.

A.= B. & lt

C.& gtd. Unable to determine.

4. There are four cards, 2, 4, 6 and 9. Xiao Ming said to Zhang Cong, "If the number is a multiple of 2, I will win. If the number is a multiple of 3, you win. " Do you think this ()

A. seize the opportunity, there is nothing fair or unfair.

The area of this triangle is 9.6 square centimeters and the height is 3.2 centimeters. The correct formula for finding the bottom is ().

a . 9.6 \3.2 b . 9.6×3.2 c . 9.6×2 \3.2

Fourth, the calculation should not be sloppy, I believe you are the most careful!

1, I am a small molecule (3 points)

7.5×2.5×4= 0.36÷0. 12= 1.25×0.8×0.5=

99×0.25= 2.4×7÷2.4×7= 8×0. 125÷8=

2, my algorithm is good! (18)

4.75× 17.5+2.5×4.75 1.25×32×0.25

12.3+6.74+7.7+3.26 127.86×99+ 127.86

0.22× 1.5+ 1.54 1÷2.3 (5. 15-3.25)×0.4+0.36

3. I can solve the equation (12)

3.8+x=6.3 2x-97=34.2

29-5x=2.3 2(x-3)=5.8

Five, I can do it.

1. Please draw a triangle with the same area based on one side ABC of the triangle (2 points).

2. The school numbers students, and it is stipulated that boys use 1 and girls use 2. For example, "04 1304 1" means "No.04, Class 3, Grade 1, enrolled in 2004 is a boy", and Xiao Fang is Class 5, Grade 1, enrolled in 2006. Please give her a student number. (2 points)

3. Calculate the area of the following combination diagram (3 points)

Six, solve the problem (25 points, 5 points for each question)

1. There is a parallelogram Gua Tian with a base of 6.8m, which is twice as high. If you plant 5 seedlings per square meter, how many can you plant?

2. A factory saves 8.4 tons of coal in three days. According to this calculation, how many tons of coal can be saved in five days?

The distance between a and b is 196 km. Car A walked from place A to place B for four hours, with 56 kilometers left. How many kilometers does this car travel per hour?

4. My mother bought 20 Jin of rice and 15 Jin of flour, and she was going to 85 yuan before. It is known that how much is rice per kilogram of 2.6 yuan and flour per kilogram?

5. The school organized students to collect plastic bottles. In grade six, 200 plastic bottles were collected, 80 fewer than in grade five. How many plastic bottles did the fifth grade collect? (column equation solution)