The product of 1 and 5.04×2. 1 is a decimal (); The quotient of 22.6÷0.33, with one decimal place reserved, is about ().
2. Two decimal places () and three decimal places () will be reserved.
Fill in ">" < or "=" in the circle below.
3.25×0.98 3.25 A ÷0.97 A (A≠0)
0.75÷0.5 0.75×2
4. A classmate's ID number is 510402199703155221. This classmate was born on () of () year, and her gender is ().
5. Kobayashi buys four pens, one yuan each; I bought five more exercise books at B yuan each. The amount of money paid by a * * * can be expressed by formula (); When a = 2.5 and b = 0.5, a * * * should pay () yuan.
6. Move the decimal point of a decimal to the right by two places to get a new number. The difference between this new number and the original number is 44.55, and the original number is ().
7. Master Wang processes one part and 20 parts in 5 minutes, so it takes () minutes for Master Wang to process 1 part on average, and () parts can be processed in 1 minute.
8. The three sides of a right triangle are 3 cm, 4 cm and 5 cm respectively, and the area of this right triangle is () square cm.
9. The upper bottom, lower bottom and height of the right-angled trapezoid are 10dm, 12dm and 8dm respectively, and its area is () square decimeter; Draw the largest square in the trapezoid, and the area of the square is () square decimeter.
10. There are six balls in the box, which are marked with the numbers 1, 2, 3, 4, 5 and 6 respectively. Contact with any one, there are () possibilities. The probability of each result is (), the probability of singular is (), and the probability of less than 3 is ().
Second, criticize, and I will judge. (5 points)
1, a2 and 2a have the same meaning. ( )
2. When two numbers are multiplied, the product must be greater than any factor. ( )
3. After the rectangle nailed by four pieces of wood is drawn into a parallelogram, the perimeter and area remain unchanged. ( )
4.9.999999 is a cyclic decimal. ( )
5. All equations are equations, but all equations are not necessarily equations. ( )
Third, after careful consideration, I will choose. (5 points)
1, each empty bottle can hold 2.5 kilograms of salad oil. Miss Wang needs at least () bottles to put 25.5 kilograms of salad oil in such bottles.
a、 10 B、 1 1 C、 12
2, the following graphics can't close shop is ()
A, regular pentagon b, regular hexagon c, regular triangle
3. Put 15 balls in a box, including 5 red balls, 2 green balls, 7 black balls and 1 yellow balls, and take them out of the box.
Touch a ball at will, the possibility of touching the red ball is (), and the possibility of touching the yellow ball is ().
A, B, C, D,
4. The teacher's home is in Building 06, Unit 3, 08th Floor, Happiness Community. If F is used to represent a happy community, then the teacher's home is.
The number of is ()
Answer. F—06—3—08—3 b . F—3—06—3—08 c . F—6—3—8—3
5. In the picture on the right, two triangles (indicated by shading) are drawn in two squares with equal sides. they
Compared with the area of ()
A, A has a large area, B has a large area, and C is equal.
Fourth, carefully examine the questions, and I'll do the math. (40 points)
1, write the number directly (5 points)
3.5×0. 1= 3.6÷0.09= 200×0.04= 12÷ 1.2= 1.3×0.5=
0.42÷0.6= 3.2×0.5= 0.2 1×0.3= 2.5× 1.4= 5.5÷ 1 1=
2, column vertical calculation (6 points)
0.73×2. 15 7.38÷ 1.6
3. Calculation of the following problems can be simplified. (12)
8.4×0.26+0.74 5.5× 17.3+2.7×5.5
3 1.7-0.5×0.7- 1.65 0.8×(3.2-2.99÷2.3)
4, solve the equation (12 points)
7 -2×9=8 1 7+5 =42
13 -7.5 = 19.25 (32- )×6= 108
Five, practical exercise, I'll do it.
(1) Please connect. (3 points)
Please draw a picture from different directions. (2 points)
Left: right:
(3) Find the area of the shaded part (unit: meter) (5 points)
Six, solve the problem, I can do it. (25 points)
1. School Art Festival, 20 garlands and 20 colored balls were prepared, which cost * * * 100 yuan. How much are colored balls and garlands per 3.5 yuan?
2. parallelogram plot, with a bottom of 250 meters and a height of 68 meters, with 3400 kilograms of rapeseed. How many kilograms of rapeseed is produced per hectare on average?
The Spring Festival is coming. A supermarket bought 540 small Chinese knots, 60 less than 4 times that of big Chinese knots. How many big Chinese knots did the supermarket buy? (Equation solving)
There are 480 peach and pear trees in the orchard. There are three times as many pear trees as peach trees. How many peach and pear trees are there in the orchard? (Equation solving)
The monthly electricity consumption of Xiaoming's family in the first half of last year is as follows (electricity consumption unit: kWh).
June one two three four five
Power consumption /kWh 8 1 85 65 55 47 63
1, what is the average monthly electricity consumption in the first half of the year?
2. What is the median of these data?