1. The law of additive combination is expressed in letters:
2. additive commutative law is represented by letters:
3. The number 1 greater than 699999 is Yes.
4. Multiplicative commutative law is expressed in letters:
5. Compare sizes.
240× 15□240× 10×5
6. Compare sizes.
28-28×0□(28-28)×0
7. Compare sizes.
(45+25)×6□45×6+25
8. The law of multiplicative association is expressed in letters:
9. Compare sizes.
96-(54+26)□96-26-54
10. Compare dimensions.
60×4×2×25□60×2×(4×25)
1 1. Compare dimensions.
27× 13+27×27□( 13+27)×27
12. 13870000 kg = 10000 kg
13. The laws of multiplication and distribution are expressed in letters:
14.1195 million people ≈ 1 100 million people.
15.7045200760 is pronounced as:, and the mantissa after omitting 1 100 million bits is about:.
16. 1, 806, 7020 Writing: Round to 10,000 places.
17. The largest six digits are, the smallest six digits are, their sum is, and their difference is.
Second, simple calculation (3 points for each small question *** 2 1 point)
1.563+296=
2. 100 1×78
3.4500÷25
4. 125×24
5. 1846-620-380
6.8× 125-25×6×4
7.32×46+32×54
Third, the calculation problem (3 points for each small question *** 15 points)
1. 156-x=78
2.x+72= 146
3.x× 1 1 = 12 1
4.750÷x=30
5.408×(3080- 1980)+7 12
Fourth, the narrative topic of the text (4 points for each small question *** 8 points)
1. The divider is 432, the quotient is 13, and the remainder is 16. Find the divisor.
What is the sum of the quotient of 2.2520 and 30 plus the product of 12 and 75?
Verb (abbreviation of verb) application problem (6 points for each small question *** 12 points)
1. A factory originally planned to produce 4,800 farm tools a year, but actually completed the task in 10 months. How much more farm tools are actually produced each month than originally planned?
A machine can process 320 parts in 8 hours. According to this calculation, how many hours does it take to process 2000 parts with five machines?
The fourth grade elementary school mathematics book 2 unit 2 test paper 2 I will fill in "sit in the right place":
1. Triangle can be divided into () triangle, () triangle and () triangle according to the size of the angle.
2, the triangle has (). A parallelogram has a () property.
3. One angle in the triangle is 45, the other angle is twice as large, and the third angle is (), which is a triangle ().
4. Acute triangle, right triangle and obtuse triangle. The sum of the internal angles is (), which is an isosceles triangle, one of which has a base angle of 26 and a top angle of ().
5. If the lengths of two sides of a triangle are 3cm and 5cm respectively, the length of the third side may be greater than () cm and less than () cm.
6. There are () groups of parallelograms whose opposite sides are parallel.
7, () and () are special parallelograms.
8. Divide a big triangle into two small triangles, and the sum of the internal angles of a small triangle is ().
9. The sum of two internal angles of a triangle is 85. This triangle is a () triangle, and the other angle is () degrees.
10, the length of an equilateral triangle is 9 cm, and the circumference is () cm.
1 1, there are () angles in the picture on the right.
Second, I will judge "distinguish right from wrong". (Mark "√" for the right and "×" for the wrong).
1, an equilateral triangle must be an isosceles triangle. ( )
2. A set of quadrangles with parallel opposite sides is called trapezoid. ( )
3. Xiao Qiang drew an isosceles triangle with three angles of 50 70 50 ().
4. Two triangles with the same size can be combined into a parallelogram. ( )
5. Cut off an acute angle of 20 in the triangle, and the sum of the remaining internal angles of the figure is 160. ( )
Third, I will choose "merit-based admission". (Put the serial number of the correct answer in brackets).
1, all equilateral triangles are triangles ().
A, obtuse angle b, acute angle c, right angle
2. Divide an equilateral triangle into two right-angled triangles, and the two acute angles of a right-angled triangle are () respectively.
A, 30 and 60 B, 45 and 45 C, 60 and 60.
3. A triangle has at least () acute angles.
a、 1 B、2 C、3
4. Enlarge an angle of 10 by 6 times, and then look at it with a magnifying glass of 6 times. The angle you see is ().
a、 10 B、60 C、 120 D、360
5. In a triangle, there are at most () right angles.
a、 1 B、2 C、3
6. The two sides of the triangle are 40cm and 50cm respectively, and the length of the third side can only be selected ().
a，80cm b，90cm c， 1 10cm
7. If one angle in a triangle is twice that of the other, then this triangle must not be a () triangle.
A, equilateral b, isosceles c, isosceles right angle
8. The following are the lengths of three sides of a triangle, and the one that cannot form a triangle is ().
A, 3cm, 4cm, 9cm b, 2cm, 3cm, 4cm c, 5cm, 6cm, 7cm.
9. The length of either side of a triangle is the sum of the other two sides.
A is greater than b and less than c, equal to
10. On the right, there are () triangles and () parallelograms.
() trapezoid.
a、 1 B、3 C、4
Fourth, I can draw "hands-on operation".
1. Draw an obtuse triangle, a parallelogram and a right trapezoid on the point diagram.
2. Draw a stroke to make the picture below form a triangle and trapezoid.
Extended reading: the final examination paper of mathematics in the fourth grade of primary school
First, fill in the blanks. 20%
(1) The ratio between every two adjacent counting units is 10, which is called () counting method.
(2) In the integer bit sequence table, the fifth digit from the left of the unit is (), and the counting unit is (); The ninth place is (). The number "9" on this bit means ().
(3) Numbers consisting of three billion and five million and six thousand, written in (); Read (). This figure is rounded to "ten thousand places", which is about () ten thousand.
(4) The multiplication algorithms are (), () and ().
5] 80496 ÷ 387, divisor is generally regarded as () trial quotient, and the highest bit of quotient is (), so quotient is () digits.
[6] 635 square decimeter = () square meter () square decimeter.
5 square decimeter 2 square centimeter = () square centimeter
(7) Use 12 squares with a side length of 1cm to form a rectangle with the longest circumference, whose circumference is () cm, the rectangle with the shortest circumference is () cm, and the areas of both rectangles are () cm 2.
Second, the judgment question. 4%
(1) When a rectangle is 6 cm long and 3 cm wide, its perimeter and area are equal. ( )
(2) The areas of two rectangles with equal perimeters must also be equal. ( )
⑶ The calculation method of multiplication is based on: ① Multiplication commutative law; ② Correlation of multiplication and division. ( )
⑷ The multiplication table expressed by letters can be written as: a× (b+c) = a× b× c ()
Third, calculation.
(1) is calculated vertically. 8%
①7304+ 12698= ②78000÷375=
⑵ Calculate with recursive equation. 12%
①3400-4530÷ 14×3 ② 150× 108+ 12000÷48 ③640÷(58×28- 1304)
⑶ Calculate with a simple method. 16%
① 147+386+853 ②2485-(760+ 1485)
③ 198÷2×45+45 ④75× 128-28×75
(4) Find the unknown x and write the basis of the first step. 8%
①3200-X=485 ②4872÷X=203
5] Text questions. 8%
① 180 minus the quotient of 180 divided by 12, ② 130 multiplied by the sum of 64 and 138.
What is the difference? What is the product?
Fourth, the application problem. 24%
The train traveled 204 kilometers in 2 hours. At this speed, the railway from Guangzhou to Beijing is 2346 kilometers long. How many hours will it take?
The basic quantitative relationship is: () ○ () = ()
(2) It takes 8 hours to process 2,400 parts in a workshop, and 5,600 similar parts can be processed at the same time after technical transformation. How many parts can be processed per hour after technical transformation (two ways)?
(3) Xiaohong reads story books, reading 15 pages every day, and it takes 12 days to finish. If you read 20 pages a day, how many days can you finish it? How many pages should I read every day if I am required to finish reading in 6 days?
(4) There is a rectangular orchard, 80 meters long and 35 meters wide. What is the area of the whole orchard? If you want to put a fence around the orchard, what is the length of the fence?