4. In 2, 23, 36, 47, 65, 7 1,11,odd numbers have (), even numbers have (), prime numbers have () and composite numbers have ().

7. Three small cubes with a length of 2 cm are spliced into a cuboid, and the surface area of the cuboid is less than the sum of the surface areas of the three small cubes (? ) square centimeters?

True or false: numerator 7/ 10× 2, denominator plus 10, and the fractional value remains unchanged. (? )

6.M=5n(mn is a non-zero natural number), and the following statement is incorrect.

The greatest common factor of a, m and n is n.

The least common multiple of b, m and n is m.

C and n contain a factor of 5.

3. After connecting two cubes with the same size into a cuboid, the surface area is reduced by 4 square centimeters. What is the surface area of a cuboid?

4. A cuboid glass container, measured from the inside, is 3cm long and 2cm wide. Pour 7.5 liters of water into the container, and then put an apple into the water. At this time, the water level in the container is 13 cm. What is the size of this apple?

Second,

3. The weight of a pile of soil is1516 tons, and it takes 2/5. ) tons? How much is left in the total ()?

4. A book 128 pages, Xiaolan read 54% of the books in four days. ) page? Read () pages a day on average?

3. The original price of a suit is 180 yuan, and the current price is 4/5 of the original price. What's the current price?

three

There are 200 students in the third grade, 2/5 fewer in the second grade than in the third grade, and more in the first grade than in the third grade14. How many students are there in the first, second and third grades?

four

As shown in the figure below, if the diagonal length of a small cube is 20cm, then the point (1, 0) is located at 40cm in the northeast direction of 45 degrees. ), point (3, 7) is 60 meters west of point (),

(1, 6) 80 cm in the direction of 45 degrees east of south is the point (? )

A ladybug is 60 degrees northwest of the snail. If ladybugs are observed, snails are in (? )

30 degrees east-southeast,

30 degrees east-southeast,

50 degrees southeast.

The Sany ship should have an emergency mission when sailing at 60 degrees north-east, and turn 90 degrees clockwise to perform the mission. What is the sailing direction of this ship at this time? )

60 degrees east of due south

30 degrees west of north,

C, 30 degrees south latitude.

Xiao Ming's father walked 300 meters east from home to the square, then 200 meters east and 40 degrees south to work in the company. It describes the route of Xiao Ming's father going home in the same way after work, and draws a road map.

five

4. The sum of a natural number and its reciprocal is equal to twice this natural number, and this natural number is ().

5. 1/3 of A is equal to 1/4 of B. If B is 60, then A is ().

6.()M is more than 1/4M 1/2, and 4M is less than () M 1/2. ..

7, Xiaoqing 3/4 hours, mushroom picking 5/ 12 kg, an average of one hour mushroom picking (? ) kg, at this rate, only mushrooms 1 kg will take () hours.

4，3，7/9 X- 1/3 X=2/3

5. It is known that there are 80 peach trees in the orchard, the number of pear trees is more than peach trees 1/4, and the number of pear trees is less than apple trees 1/3.

1. How many pear trees are there in the orchard?

How many apple trees are there in the orchard?

In a basketball match, 1 class scored 56 points, of which the score in the second half was 3/4 of that of 6 1 class in the first half. How many points did you score in the first half and the second half respectively? Solve by equation.

A workshop plans to produce a batch of parts. It takes 18 days for production line A to produce alone. The average number of parts produced by production line A is half less than that of production line B, and both production lines are produced at the same time. How many days can this batch of parts be completed?

six

5.A took 15 hours, and B took 10 hours. What is the speed ratio between A and B? )

8. Put 50g of salt into 2kg of water. What is the weight ratio of salt to water? ), the ratio of salt to brine is (? )

3. Make a rectangular frame with 120cm iron wire, and the length-width ratio is 3:2: 1. What are the length, width and height of this cuboid?