Class name

1. I can fill it in. (18 points)

1. (0.6) square meters = 600 square decimeters

125 minutes = (2) hours (5) minutes

2. The length of a cuboid is 8 decimeters, the height and width are both 5 decimeters, its surface area is (210) square decimeters, and the sum of its edge lengths is (36) decimeters.

3. The product of the largest prime number and the smallest even number within 10 (except 0) is (14).

4． The surface area of ??the cube is (6) times the area of ??the base.

5. Within 20 (including 20), the multiples of 5 are (5, 10, 15, 20), and the factors of 20 are (1, 2, 4, 5, 10, 20).

6． The smallest three-digit number that is divisible by 2, 3, and 5 is (120), and the largest two-digit number is (90).

7. Among 10, 15, 18, 2, 28, 23 and 21, the prime number is (2, 23), the composite number is (10, 15, 18, 21), and the odd number is (15,

23 , 21), even numbers are (10, 18, 2, 28).

8. A number that is both a multiple of 35 and a factor of 35 is (35).

9. Among the natural numbers, a number that is neither prime nor composite is (2).

10. The sum of the edge lengths of a cube is 72 decimeters, and its surface area is (864).

2. Please be the little judge. (16 points)

1. All prime numbers are odd numbers. (F)

2. When m is a natural number, 2m must be an even number. (T)

3. Numbers with units digits of 3, 6, and 9 must be multiples of 3. (F)

4. The product of two prime numbers must be a composite number. (F)

5. A prime number has only one factor. (F)

6. A rectangle has only two axes of symmetry. (T)

7. The three edges of a cuboid are called its length, width and height respectively. (T)

8. The surface area of ??a cube with an edge length of 8 cm is four times that of a cube with an edge length of 2 cm. (F)

3. Take your seat. (12 points)

1, 2, 3, 5, and 7 are all (③)

① odd numbers ② even numbers ③ prime numbers ④ composite numbers

2, The largest odd number within 100 that is a multiple of 3 and 7 is (③)

① 21 ② 63 ③ 84 ④ 97

3. If the edge length of the straight body is expanded by 3 times , then its surface area expands to (②) times.

① 3 ② 9 ③ 27 ④ 6

4. How much iron sheet is used to process a rectangular chimney is to find the area of ??(③) faces of the chimney.

① 6 ② 3 ③ 4

5 A rectangular pool is 20 meters long, 10 meters wide and 2 meters deep, covering an area of ??(①) square meters.

① 200 ② 400 ③ 520

6. Three small cubes with edge lengths of 1 cm are glued together to form a cuboid. Its surface area is (②)

①18 square centimeters ②14 cubic centimeters

③14 square centimeters ④16 square centimeters

Four. I can count.

(18 points)

1. 1.5*1.3*42． = 81.9`

2.7 +3 .1 +2 .9 +3 .3 = 16.3

3 , 25-4 .9 -6 .1 = 14

4 , 3 .5*4.8 +2 .2*2.4 = 22.08

5 , (13 +5 .2)/1.3

6 , 200 - (3.05 7.1)*18 = -189.79

5. Calculate the surface area of ??the figure below (3 points for each question, ***6 points)

6. Please design and draw a square yourself and draw all its symmetries axis. (4 points)

2. There is both factor 3 and factor 5.

15

3 is a multiple of 2, 3, and 5 at the same time. 30

8. Solve problems. (20 points)

1. Xiao Ming’s grandfather plans to order a cube goldfish tank without a lid. The edge length is 4 decimeters. Please help me calculate how many square decimeters of glass will be used? 4*4*5 = 80

2. A rectangular food box, 10 cm long, 8 cm wide, and 12 cm high. If a circle of trademark paper is affixed around it (no stickers on the top and bottom), what is the minimum area of ??the trademark paper?

10*12*2 8*12*2 = 432

3. The oil store transported 84 kilograms of rice. If every 7 kilograms is packed into a small bag, can it be filled completely? If there is a small bag of 5 kilograms, can it be filled completely? Why?

84/7 = 12 can be installed exactly 84/5 = 16.8 cannot be installed exactly

4. Welcome \[OpenCurlyDoubleQuote]May Day\[CloseCurlyDoubleQuote] \

On International Labor Day, our school will install colored lights on the four sides of the trade union club (the four sides of the ground will not be installed). The union club is known to be 40 meters long, 30 meters wide and 20 meters high. What is the minimum length of lantern wire needed?

40*20*2 30*20*2 = 2800

5. Can you calculate quickly? All the factors of 36 are (1, 2, 3, 4, 6, 9, 12, 36), and all the factors of 40 are (1\

, 2, 4,, 5, 8, 20, 40).