Class name score

First, fill in the blanks. ( 19%)

1、0. 125= 5:( ) = ( )%= ( )÷( )

2, 1.06 cubic decimeter = () liter

= () ml 2 hours and 20 minutes = (

) hours

3. For a project, it takes 10 hour for Party A to do it alone, and 8 hours for Party B to do it alone. The working time ratio of Party A and Party B is ().

4. The side length ratio of two cubes is 3 ∶ 2; The ratio of the surface areas of large and small cubes is (); The volume ratio of large and small cubes is ().

5. Divide the 5-meter-long rope into 8 parts on average, each part is () meters long and belongs to this rope.

6. 100g rapeseed can produce 32g oil, and the oil yield of rapeseed is ()%; Press 64 tons of oil to () rapeseed.

7, four (3) class sports standard total number, standard number and class number are between 40-50, the class has ().

8. In 2002, a plane crashed in Beihang University, and a passenger got 200,000 yuan compensation because he bought 20 yuan insurance. The simplest integer ratio of compensation amount to insurance amount is ().

9. Xiao Zhang drove from place A to place B, and the speed increased. The time needed now is the original time.

10, a car is 45 kilometers per hour. According to this calculation,120km needs to drive for () hours.

1 1. If the number of class A equals the number of class B, the number of class A belongs to class B. ..

12, a 48 cm long iron wire, just made a rectangular frame with a length of 5 cm and a width of 4 cm, and the height is () cm.

Second, the judgment question. (5%)

1, because the reciprocal of 1 is 1, so the reciprocal of 0 is 0. ……………………………( )

2. The number of A is less than that of B, which means that the number of B is 40% more than that of A ..................................... ()

3.99 parts are all qualified, and the qualified rate is 99%. ……………………………( )

The winning rate of a lottery ticket is 1%, so if you buy 100 lottery tickets, you will definitely win the prize. …( )

5. Dissolve 10g salt in 90g water, and the ratio of salt to brine is 1: 10. ……………( )

Third, multiple choice questions. (4%)

1, a watch will be sold at a 20% discount after the price increase, and the current price is ().

A, B is higher than the original price, C is lower than the original price, and D is equal to the original price, which is uncertain.

2. Party A and Party B have two ropes of equal length. A cuts the rice, B cuts the remaining rope ().

A, a is long b, b is long c, and the same length d is uncertain.

3. For a cup of sugar water, the ratio of sugar to water is 1: 16. After drinking half, the ratio of sugar to water in the remaining sugar water is ().

A, 1: 16b, 1: 8c, 1: 32d, uncertain.

4. The circumference and area of a circle with a radius of 2 cm are compared ().

A, the week is longer than B, the area is larger than C, and the perimeter and area are equal to D, so they cannot be compared.

Fourth, calculation

1, a number written directly. ( 10%)

+= ÷= 3.6×= += ×0.2=

×= -= × 1.5= ×= 3.5×=

2. Off-mold calculation. (Simplify what can be simplified) (18%)

÷+÷ ÷[(+)×]

(-×)÷ +++

-×+ 2-(+)-

Fifth, solve the equation. (6%)

X+×= 1 X-X=

Six, column calculation. (8%)

The number 1.3 is greater than 20% of 18.5. Find this number. (Equation solving)

What is the quotient of the difference divided by?

Seven, solve the following problems. (30%)

1.The length of the highway between city A and city B150km. A car has been driving from city A to city B. How many kilometers does the car leave city A?

A computer now costs 4800 yuan, which is lower than the original price. What is the original price? (column equation solution)

3. Rectangular vegetable field with a perimeter of 40m and an aspect ratio of 4: 1. What is the length and width of this vegetable field?

There are three kinds of fruit trees in the orchard, among which the number of pear trees accounts for 1:5. There are 65,438+080 pear and apple trees. How many fruit trees are there in the orchard?

5. The grain store has 20 bags of rice and 50 bags of flour, weighing 2250kg. It is known that the weight of 1 bag of rice is equal to the weight of 2 bags of flour, so what is the weight of a bag of rice?

In order to welcome the 2008 Olympic Games, a swimming pool with a length of 50 meters, a width of 30 meters and a depth of 3 meters will be built.

How many square meters is this swimming pool? (2) How many cubic meters of water can this swimming pool hold at most?