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Education Times Mathematics Guidance Edition Grade 8 People's Education Edition 2065438+04 August 5 Answer
Students, this semester, we must say goodbye. You must learn many skills. Now

Test it! Remember to be careful! ! ! ! !

One, I will fill in (***30 points) 1.

1, the side length of a square is 60 cm, which is the volume () CM3.

2. Students planted trees, 490 trees survived, 10 did not survive, and the survival rate was ().

3. Cut the rectangle into exactly two cubes. After increasing the cutting surface area, the volume of the rectangle increases by18m2.

Who is () cubic meters?

As shown in Figure 4, between two numbers, the difference between A and B is 80, the number of B is 20, and the number of B is a ()%.

5. Fill in the corresponding unit name in brackets.

Xiao Ming is about 120 (), and the volume of a glass of milk is about.

The size of the matchbox is about 8 ()

6 250(),()÷ 16 =()%。

7, the smallest odd number, the smallest number and the smallest prime number, the reciprocal of the number of 3 is ().

As shown in Figure 8, when the number of groups is 1.67, 1.3, 170% 1.67, the maximum number is (), and whether the minimum number is ().

9. The road was built on the first day, and it was repaired the next day, and no maintenance was left.

10, evenly divide the rice into 5 sections, each section is full-length, and each section is () meters long.

Second, please judge as little as possible. (Tick "√" and make a mistake "×".

1, boys are more than girls 10%, girls are 10%, less than boys. ()

2. Some clothes are sold at 70% and the remaining 30%. ()

3,2 cm is 8 times the side length of a cube with a side length of 1cm. () same

The calculation results of 4×3 and 3× have different meanings. ()

3. Please select one (16 points).

1, the side length of a cube is twice () times the sum of its side lengths,

Area expansion () volume expansion () times.

a、2 B、4 C、6 D、8 E、9

2. The following proportion numbers cannot be translated as Yes ()

a,0.75 B, 1 10 C, 138

3, 172, 135, 142, 1 10, 139, 138 148

The median of this group is ().

a, 135 B, 1 10 C, 138

As shown in Figure 4, the fan chart can be () and the line chart can be ().

A, changes in the number of trains displayed. In B, it shows how to change the amount.

C, the number of parts and the total number of programs, the number of parts and the number of relationships.

5, the following can be folded into a cube mode is ().

4, you do math problems (27 points)

1, write numbers directly (10 points)

1÷= 0÷= + = - = 2 =

×20 = %÷=×30%= 3.5 + 1.5 = 0.5×=

2. Do what you like (8 points)

×+÷3 1÷[(+)×]

÷ - ××37%+×37%

3. Solving equations: (6 points)

( 1)X 14 = 37.5+20% X = 69.5 X-X =

4. Column formula: (3 points)

How much is 2 to 0.5 times more than x? Looking for X.

5. Please solve practical problems:

1, a pair of pants is $ 120, because the price is 30% lower and 30% higher than last season. What's the current price?

2. The following are the results of the first batch of Grade Five (1) students:

Student ID1234556789101112.

Achievement1008554941008773 94 97 86 94 92

1) determines which data set, median, mode and average.

2) If you get more than 90 points for the Excellence of these students, what is the excellent rate score?

3) Of the total number of students in 12 this year, how many are in the whole grade?

3. Cut four small squares with 3 cm corners from a 26 cm long iron plate.

Then it is proved that the volume of the iron box connected into a rectangle is 840 cubic centimeters. The metal sheet was originally

How many centimeters wide is it?

4. Build a road. It is180m, but it is more than 60m. How long is the road?