I. Oral calculation (6 points)

Fill in the blanks (14)

( 1)6.0 1kg =()g 3 m2 70 m2 =()m2。

1.3 hours = () hours () minutes 54 decimeters = () meters

(2) The quotient of two numbers is 4.5. Divider and divisor are expanded 20 times at the same time, and the quotient is ().

(3) From someone's ID number 441900199607123452, we know that this person's birth time is () and his gender is ().

(4) Xiaohong bought two pens, each of which cost X yuan. Paid 20 yuan, she should get back () yuan.

(5) The commercial summary method of 8 ÷ 3 is marked as (), and the accuracy is ().

(6) The base of the parallelogram is 8 decimeters, the height is 6 decimeters, and the area is () square centimeters.

(7)0. 125×( )=0. 125÷( )= 1

(8) Arrange 3.05, 3.05, 3.05 and 3.2 in descending order.

(9) The area of a triangle is 15 cm2, the base is 5 cm, and the height is ().

(10) Master Wang can produce B pieces in 3 hours, and can produce () pieces per hour, and it takes () hours to produce one piece.

(1 1) The base of the parallelogram is10cm and the height is 6.4cm.. The area of a triangle with the same height as the base is () square centimeters.

Three judgments (5 points) (mark "√" for the right and "X" for the wrong)

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

(2)x=2.5 is the solution of the equation 14.5-2x=9.5. ( )

(3) Formulas containing unknowns are called equations. ( )

(4) The multiplication and division method expressed by letters is (ab)c=a(bc). ( )

(5)4.28428428 is a cyclic decimal, and the cyclic segment is 428. ( )

Four. choose (5 points) (Fill in the letters of the correct answer in brackets)

(1) The following is the existence of the equation ().

a2y+8b 2x- 15 & gt； 7 C 2y-5= 18

(2) The result of the following () is greater than 1 1.6.

a 1 1.6×0.98 B 1 1.6÷0.98 C 1 1.6÷ 1.98

(3) Because 2.75×38= 104.5, 27.5×( )= 10.45.

A 0.038 B 0.38 C 3.8 D 38

(4) When the base and height of a triangle are expanded by four times, its area will be expanded by () times.

a、4 B、8 C、 16

(5) The height and area of parallelogram and triangle are equal. The base of a given parallelogram is 4 cm, and the base of a triangle is () cm.

A 4 B 8 C 2

Verb (abbreviation for verb) calculation. (28 points)

1. Solve the equation (6 points)

2χ-3.4=7.2 2.4x+ 1.6x=2.2

2. Only calculate formulas or equations, not calculate (4 points)

What is the result of dividing (1) 1.2 by the quotient of 3.96 and multiplying 2.7 by 13.7?

②20 is more than four times a number, 10. Find this number.

3. Calculate the following questions. What can be simplified must be simplified. (18)

9.5× 1.06-2.52÷2.4 6.25÷ 1.25÷0.8 2.5×(3.5- 1.65)×0.4

27.2÷(3.2+23×0.6) 68.5+3 1.5÷(0.29+0.4 1) 3.82 ×(2.8- 1.3)- 1.82× 1.5

Six. Hands-on practice (10)

Xiao Gang observed a teapot. Which direction did he look?

3. Draw a parallelogram on a set of parallel lines on the right, so that

Its opposite sides are on these two parallel lines, and the sides are long.

It is 2 cm, and then draw its height.

Seven. Solve the problem. 32 points

1. Read the requirements before you answer.

Xiaoming bought 4 kilograms of sweet oranges and 3 kilograms of apples with 35 yuan. It is known that how much is sweet orange per kilogram of 5.2 yuan and apple per kilogram? 3 points

(1) Write the equivalence relation that meets the meaning of the question.

(2) List the equations that have not been calculated:

2. 680 kilograms of rice per square meter of paddy field. Trapezoidal paddy field with upper bottom17m, lower bottom 8m and height 7m. How many kilograms of rice can this paddy field produce? 3 points

(1) How many kilograms of rice can this paddy field produce? We must find out first.

(2) Only the comprehensive formula is not calculated:

3. List solutions. 26 points

(1) The bottom of the triangular glass is 12.5 decimeter and the height is 7.8 decimeter. If the price of glass per square decimeter is 0.8 yuan, how much does it cost to buy this kind of glass?

(2) A construction site shipped 32.5 tons of stones on the first day, 0.5 tons more than four times the next day. How many tons of stones were delivered the next day?

(3) A grain transportation team, with 5 vehicles transporting 22.5 tons of grain. According to this calculation, how many vehicles are needed to transport 1 18 tons of grain?

(4) The processing workshop has to process 875 parts, which has been processed for 3.5 hours, and 50 parts are processed every hour. The rest will be processed at an average speed of 56 pieces per hour. How many hours will it take to finish this task? (Equation solving)

(5) The school organized teachers and students to watch movies, with 950 students and 27 teachers. 8 yuan, an adult, and 4 yuan, a student. More than 30 people can buy group tickets, group tickets to 6 yuan. Please design the most economical ticket purchase scheme. How much will it cost at least? (There must be a calculation process)