Fill in the blanks. (20 points)
1, Qinghai Lake, the largest saltwater lake in China, is 3 193 meters above sea level, which is expressed as () meters above sea level with positive or negative numbers. Guangxin Clothing Store made a profit of 3,000 yuan this year 1 month, and recorded it as+3,000 yuan. In March, it was-1.800 yuan, indicating that this clothing store was () yuan in March.
2. Fill in the appropriate decimals in brackets: 45 mm = () meters, 5.58 cents = () yuan.
3. Two decimal places consist of five decimals, six tenths and three percent. This number is written as (); One percent and one percent of the decimal are 8, and the rest are 0. This number is pronounced as ().
4. Rewrite1172,800,000 yuan into "100 million yuan" and the number is () 100 million yuan; Keep 654.38+4.96 million kilometers to two decimal places, which is about () million kilometers.
5. In descending order, 0.506, 0.065, 0.56, 0.056, 0.66: ().
6. The base of the triangle is 8 cm, the height is 2 cm, and the area is () square cm; The area of parallelogram is more than that of triangle with equal base and equal height 12.6 square meters. The area of this parallelogram is () square meters.
7, a pile of steel pipes, piled into an approximate triangle, the top known 1 root, the bottom 12 root, the difference between two adjacent layers is 1 root, this pile of steel pipes * * * has ().
8. A set of pictures ... The 54th picture from the left is (), and the first 54 pictures have ().
9. The minuend is 7.6, 4.2 more than the minuend, with a difference of (); The sum of the two numbers is 15.9. If one addend increases by 5.2 and the other addend decreases by 6.4, the total is ().
10, Xiaohong missed the brackets when calculating □-(4.3+2.6), and the calculation is □-4.3+2.6, so the calculation result is more correct than the original result () (fill in "more" or "less") ().
Second, judge. (5 points)
1, 0 is neither positive nor negative. ………………………………………………………( )
2. Decimal addition and subtraction are calculated in exactly the same way as integer addition and subtraction. ……………………………… ( )
3. Add 0 after the decimal point. The size of this decimal point remains the same, but the counting unit has changed. ………… ( )
4. Two triangles with equal base and equal height can be combined into a parallelogram. ……………………… ( )
5. A two-digit decimal is about 3.7, and the maximum value of this decimal is 3.74. …………………………( )
Third, choose. (5 points)
0,-1, +9, 10,-1.2,49 has () positive numbers.
a、2 B、3 C、4 D、5
2. Rewrite 2.73 into a number of one thousandth, which should be ().
a、2.70 B、2.730 C、2.7300 D、2.7030
3,0.123412341234 ..., and the number with 100 after the decimal point is ().
a、 1 B、2 C、3 D、4
4. If the base of a triangle is expanded by 6 times and the height is reduced by 2 times, then the area of the triangle is ().
A, expand by 6 times b, shrink by 2 times c, and expand by 3 times the same area d.
5. If the area of a rectangle is 12 square centimeter (the length and width are whole centimeters), then its circumference is the largest ().
A, 26cm b,16cm c,14cm d, 28cm
Fourth, calculation. (30 points)
1, write directly. (4 points)
0.28+0.2= 0.6+0.3= 8.8-0.5= 0.88-0.08=
1-0.69= 3.4+5.6= 0.38+5.52= 5-3.4=
2. Use vertical calculation. (those marked with * should be checked) (6 points)
10.7-0.37= 5.68+3.03= * 3 1.2-8.5=
4. How to calculate the following questions simply? (10)
4.6+2.9+5.4 1 1.6-0.47-9.53 7.5-4.9+2.5
6.28-(4.28-3.5) 6.32-4.6+2.68-2.4
5. Column calculation. (Column comprehensive formula) (6 points)
How much is the sum of (1)8.77 and 6.83 more than 10?
(2) What is the product of two five plus 8.5?
Sixth, solve the problem. (3 1)
1, in physical education class, the teacher asked each row of students to count to 1~3, and Xiaoming stood in the 29th row. How much should Xiao Ming count off?
2. parallelogram parking lot, with a bottom of 50m and a height of 15m. On average, each car covers an area of 5 square meters. How many cars can this parking lot park?
3. The power supply bureau originally had a bundle of wires, which was14.85m long. The master used 0.75m for the first time and1.25m for the second time. How many meters are left in the wire at this time?
4. The primary school resource network will hold a school celebration, and it is planned to hang 104 lanterns on one side of the central road, which will be placed according to the following rules:
2 red, 2 yellow, 1 purple, 2 red, 2 yellow, 1 purple ... so how many yellow lights should be prepared?
5. The fifth-grade students collected tree species, and the fourth-grade students collected 25.6 kilograms, and the fifth-grade students collected less than the fourth-grade students 1.9 kilograms. How many kilograms of tree species do students in Grade Four and Grade Five collect?
6. The decorative sign at the entrance of the store is an isosceles trapezoid. Its upper bottom 12 meter, lower bottom 26 meters and height 6 meters. Paint one side of this decorative board (need 1kg paint per square meter). 100kg paint enough?
7. Some Chinese characters and letters are arranged as follows:
Beijing welcomes you, Beijing welcomes you, Beijing welcomes you. ...
We will see ...
If the Chinese characters and letters in the sixth column are (North, M), what are the Chinese characters and letters in the fortieth column?
8. There are several 4 m and 7 m steel pipes. If you want to install a 50-meter pipeline, how many pipelines can you choose from it and just install it?
7 meters long
4 meters long
* * * There are () methods.