7.2+2.8= 0.9÷0.0 1=

3.5+7.6= 3×0.2×0.5=

0.96÷0.3= 1.5×0.4=

7÷0.25= 2.5×0.7×0.8=

8-2.5= 16÷ 1.6=

5.6× 1.0 1= 8×(2.5+0.25)=

0.36+0.64= 64.32÷ 16=

72.8÷0.8= 8.4×0.2+ 1.6×0.2=

8.4÷4.2= 0.05×0.8=

2.56-0.37= 1.25×0.8×0.5=

12×2.5= 1.23×3=

3.2÷ 1.6= 3.5+3.5×3=

19.6÷2= 8.8÷2.2=

3.9+2.03= 7.2×0.3+2.8×0.3=

13.8+9.9= 2.4×2.5=

0.75×4= ( 1.5+0.25)×4=

4.2÷0. 1= 4.2÷3.5=

2. 14-0.9= 27+456+73=

12÷0.3= 2.87÷0.7=

13÷4= 24÷4+56÷4=

Two. Fill in the blanks (***20 points, 65438+ 0 points for each blank)

1. The meaning of multiplying a number by a decimal is to find (), () () ...

2.0.9× 4 means ().

3.0.25 hours = () minutes () hours =2 hours and 45 minutes 10 minutes = () yuan.

4. If there are parentheses in the expression, first calculate what is in (), and then calculate what is in ().

Formula 5.0.9 ÷ 0. 1 1 means ().

6. According to the invariance of quotient: 1 ÷ 0.08 = () ÷ 8.

7. 160 square centimeter = () square decimeter = () square meter

8. The area of parallelogram = (). The formula for calculating the parallelogram area in letters is ().

9. The triangle has an area of 18 square meter, a height of 9 meters and a base of () meters.

10. the sum of a and b is 18, b is x, and a is ().

1 1. The process of solving equation () is called solving equation.

12.a divided by b and multiplied by C 3 times is ().

13. The area of a trapezoid is 76 square meters, the bottom is 12 meters, the top is 8 meters, and the height of the trapezoid is () meters.

Three. Judgment (put "√" in brackets for the correct and "×" in brackets for the wrong) (8 points)

1. Decimal multiplication has exactly the same meaning as integer multiplication.

( )

2. Decimal division has the same meaning as integer division.

( )

3.4x-b = 0 is not an equation.

( )

4. Equation 2x=0, and the value of x is 0.

( )

A trapezoid consists of two parallelograms.

( )

6. Two triangles with the same shape can form a parallelogram.

( )

( )

8.26.84+34.6÷0.2×4=26.84+34.6÷0.8=26.84+43.25=70.09

( )

Four, calculate the following questions, can use simple algorithm with simple algorithm (8 points, 2 points for each question).

1.2.3+3.9 1÷(22- 19.7)

2. 13.7×0.25×8

3.( 1-0.2)×[ 13-(3. 12+5.28)]

4.2.65× 1.7+ 1.35× 1.7

Five, solve the equation (8 points, 2 points for each question)

1 . 5 . 5 x- 1.3 x = 12.6

2.3.85+ 1.5x=6. 1

3.6x-0.9=4.5

4.4×4.5-3x=6.33

Six, column calculation (12 points, 3 points for each question)

1.2.8 and 4, minus the quotient of 6.5 divided by 5, what's the difference?

2.0.7 divided by the quotient of 35.7, plus the product of 4.8 and 0.875. What's the total?

Multiply a number by 3 times the product of 6 and 8, and the total is 84. Find this number.

What is the product of 4.0.8 16 divided by 0.96 and multiplied by 5.06?

VII. Application Problems

1. Find the area of each graph below (6 points)

2. To build a section of highway, it is planned to build 50 meters a day, and it will be completed in 35 days. It was built 20 meters more than planned, a few days ahead of schedule? (5 points)

A machine factory can produce 720 parts in 4.5 hours with four machine tools. According to this calculation, how many parts can five machine tools 1 hour produce? (5 points)

There are 36 poplars and willows on campus, and the number of poplars is twice that of willows. How many poplars and willows are there respectively? (column equation solution) (6 points)

5. Passenger trains and freight trains run in opposite directions. Passenger trains run at a speed of 1.4 km per minute, and freight trains run at a speed of 0.85 km per minute. The bus body is 600 m long and the truck body is 1, 200 m long. How many points does it take from two cars meeting to leaving? (6 points)