1, a box of chocolates * * * has 12 pieces, which are distributed to four students on average. Every chocolate belongs to this box of chocolates () (), and everyone's share of chocolates belongs to this box of chocolates () ().
2. Use points on a straight line to represent 12, 25, 7 10, 65 and 1 12.
3. fill in ">", "
37 ○0.43 136 ○2.2 56 ○ 79 1.2○ 1 15
4. Fill in the score ().
120 m2 = () 72 minutes per hectare = ()
6 cm = () m 150 ml = () L。
45 seconds = () minutes 300 grams = () kilograms.
5.( 1) 1 contains () 14 13 contains () 16.
(2) 3024 = () 12 = 5 ÷ () = () (decimal)
Among the scores of 6.45,88,12/kloc-0,69 and 157, the true score is (), the false score is (), and the simplest score is ().
7. Boys on the dance team 12, girls 18. The number of boys is () () times that of girls, the number of girls is () times that of boys, and the number of girls in the dance team is () ().
The least common multiple of 8,7,8 is (), the least common multiple of 3,9 is (), and the least common multiple of 6, 10 is ().
The greatest common factor of 9, 19 and 20 is (), that of 8 and 40 is (), and that of 18 and 12 is ().
Second, judge.
1, the true score is less than 1 and the false score is greater than 1. ( )
2. In plan view, the number pairs (8, 3) represent the eighth row and the third column. ( )
3. The radius of the circle is increased by 2 decimeters, and the circumference of the circle is increased by 12.56 decimeters. ( )
4. The simplest true fraction is the fraction whose numerator and denominator have no common factor. ( )
54 hours is a day. ( )
Third, multiple choice questions.
1, the numerator of the false fraction must be the denominator of ().
① greater than ② less than ③ not less than.
2. Divide 7kg into nine parts, each 7kg ().
① ② ③
3, and the score is ().
(1) means the same; (2) The scores are equal; (3) The units of scores are the same.
4. Two 2-meter-long ropes, the first cut, the second cut and the rest ().
The first root is as long as the second root.
5. The radius of a big circle is three times that of a small circle, its circumference is () times that of a small circle, its diameter is () times that of a small circle, and its area is () times that of a small circle.
①3 ②6 ③9
Fourth, calculation
1, find the area of the circle below.
R=5cm D=8dm C= 12.56m
2. Calculate the following questions.
25 + 34
12 - 27
35 + 18
56 - 15
56 - 45 + 3 10
45 -(38 + 14 )
47 + 1 14 - 12
3. How to calculate it is very simple.
7 12 + 35 + 5 12 13 + 38 + 58 + 23 59 -(29 + 16 )
Operation and calculation 1. The picture on the right is a plan of a small town.
(1) The hospital is in (,) and the post office is in (,).
(2) The primary school is located at (6,4), and the primary school is marked on the map.
(3) From primary school to the post office, take the () grid.
Go to ().
(4) Draw the route from the hospital to the post office along the grid.
2. Draw a semicircle with a radius of 2 cm, and then calculate its perimeter and area.
3. Calculate the perimeter of the colored part in the figure below.
Fourth, complete the following statistics
Honghong investigated the sales of air conditioners and heaters in a shopping mall in the second half of 2005, and the records are as follows.
July: 58 air conditioners and 8 heaters; August: 60 air conditioners and 6 heaters;
September: 46 air conditioners and heaters 10; 65438+1October: 30 air conditioners and 15 heaters;
165438+1October: 20 air conditioners and 30 heaters; 65438+February: 12 air conditioner, 48 heater.
1, according to the data in the table, complete the following statistical chart.
Sales statistics of air conditioners and heaters in a shopping mall in the second half of 2005.
Quantity/Taiwan Province year and month
2. What are the sales trends of these two kinds of electrical appliances? What information did you learn from it?
5. Answer the following questions.
1. The radius of the circle and the product of the radius are 36. What is its area? (in centimeters)
2. There are 45 hectares of vegetable fields in bright primary school, of which vegetables account for 13 and cucumbers account for 15. How much vegetable land does the remaining tomatoes occupy?
3. There is a kind of milk powder which contains 320kg of protein, 0/5kg of fat and 0/2kg of carbohydrate per kilogram. Which component has the highest content? Which component has the lowest content?
4. Xiaoming visited the Garden and spent 13 hours in the zoo, 15 hours in the botanical garden and 12 hours in the children's playground. How many hours did Xiaoming stay in the park?
There are 88 workers in two workshops of a factory. After transferring 24 workers from workshop A to workshop B, the number of workers in the two workshops is equal. How many workers are there in these two workshops?
6. The distance from Liang Xiao's home to the Children's Palace is 4144m. He rode a bicycle with a wheel diameter of about 66 cm to the Children's Palace. According to the wheel rotation per minute 100, how many points does he need to ride this car to the Children's Palace? (Numbers are reserved as integers)
7. Draw the largest square in a circle with a radius of 4 decimeters. What is the area of a square?
8. The cross sections of three pieces of wood with a radius of 3 decimeters are shown below. If you want to tie them with rope, how many decimeters of rope do you need for each lap?