20 17 the first question in the final exam of mathematics in the second volume of grade four.
I. Fill in the blanks (32 points)
1 15 times. 308 is (), and 360 is () times of 15.
The capacity of a bottle of milk is about 250 (), and the electric water heater in Xiao Qiang can hold 50 ().
3. Fill in the box? ﹥? 、? ﹤? Or? =? .
950ml 1 l 3000ml 20l 20ml 2002ml
4. The speed is 80 kilometers per hour, which can be written as ();
The unit price of each bicycle is 600 yuan, which can be written as ().
5. According to 15? 6=90 Write directly: 15? 12=( ) 150? 60=( )
6.( )? 60000, the largest number that can be filled in parentheses is (), and the smallest number is ().
7. Use 0 and 2, 3, 5 and 8 to form an eight-digit number.
(1) constitutes the largest octet () (2)? Zero? Don't read ()
(3) read only one book? Zero? () (4) read two books? Zero? ( )
(5) reading three? Zero? ( )
8. 1095050 consists of () digits and () digits, with the highest digit being (), which is pronounced as (). Its mantissa after omitting ten thousand is about () ten thousand.
9. Find the pattern and write the following numbers directly.
( 1)9? 9=8 1 (2) 1? 8+ 1=
99? 99=980 1 12? 8+2=
999? 999= 99800 1 123? 8+3=
9999? 9999= ? + =
99999? 99999= ? + =
10. Two baskets of apples * * * 64kg. Take 5kg from the first basket and put it into the second basket. The two baskets are equal in weight. The original apples in the basket were () kilograms.
1 1.9: 15 to 9: 30, the minute hand rotates ()? .
True or false (hit "?" ) right in brackets), enter the wrong "?" , 5 points)
1.78200030 Read: 78.20030. ? ( )
2. Use three numbers (0, 3 and 5) * * * to form six different three-digit numbers. ( )
3. As shown in the figure on the right, rotate triangle A 90 counterclockwise around point O? , you can get triangle b? ( )
The angle of 4.20 degrees is 100 degrees under a five-fold magnifying glass. ( )
There are several zeros at the end of two multipliers, and there are also several zeros at the end of the product of these two multipliers. ( )
Three, multiple choice questions (put the serial number of the correct answer in brackets, 5 points)
1. Reading? 200708090? To read () 0.
① 1 ② 2 ③ 3 ④ 4
2. If 65438+ 100000 sheets of paper are about 1 m high, then 65438+ 1 100 million sheets of paper are about () m high.
①1000 m ② 1000 m ③ 10000 m.
3. In the following formula, multiplication is () first.
①600? 2? 20+ 10 ② 600? 2? (20+ 10) ③600? (2? 20+ 10)
4. The following equation is incorrect ().
① 1800? 2? 8= 1800? (2? 8) ②78? 3+56? 4=(78? 3)+(56? 4)
③ 18? 6? 18? 6=( 18? 6)? ( 18? 6) ④36? ( 15+5)=36? 15+36? five
5. The following figure is not axisymmetric, but ().
① rectangle ② isosceles trapezoid ③ parallelogram ④ equilateral triangle
Four, calculation experts (23 points)
1. Numbers written directly (5 points)
120+306= 45? 20= 20? 400= 560? 80= 25? 4? 25? 4=
10? 800= 385-99= 750? 5= 24? 50= 875- 154? 0=
2. Vertical calculation and checking (9 points)
17? 409= 8 16? 48= 190? 40=
3. Calculate the following questions (9 points)
15? (4 1- 17)? 30 6 18-80? 2? 5 420? [(205- 198)? 4 ]
Five, solve the problem (27 points)
1. Xiaobo has four times as many ballpoint pens as Liang Xiao. Xiaobo and Liang Xiao have 45 ballpoint pens. How many ballpoint pens do they have? (Draw a picture first, then answer)
2. Cut the largest square on a rectangular paper with a length of 20 cm and a width of 15 cm. What is the area of the rest? Draw a picture on the picture before you answer.
3. Rectangular lawn, 90 meters long, increased by 20 meters after expansion, with an area of 1.400 square meters. How many square meters is this lawn? Draw a picture on the picture before you answer.
A road team needs to build a road, and it is planned to build 200 meters every day, which can be completed in three days. In fact, it takes 50 meters less to repair every day. How many days did it actually take?
6. There are two granaries, A granary and B granary. The grain storage capacity of A granary is three times that of B granary. After A granary 150 tons is shipped out, the grain storage capacity of the two granaries is the same. How many tons of grain is stored in warehouse B?
Seven, additional questions (10)
Parentheses hold the following formula.
6? 8+ 12? 4? 1=52 6? 8+ 12? 4? 1= 14
20 17 final exam of mathematics in the second volume of grade four.
Fill in the blanks. (per grid 1 min, ***2 1 min)
1. The first digit to the right of the decimal point is (), the third digit is (), and the second digit to the left of the decimal point is ().
2. The decimal number consisting of five ones, six tenths, seven percent and 65438+ zero thousandths is ().
3. According to the angle, triangles can be divided into () triangle, () triangle and () triangle.
4.0.9 includes () 0. 1, and 2.78 includes () 0.0 1.
5. Triangle has the property of (). A parallelogram has a () property.
6. Xiaoming's height is 1.28 cm, and the decimal is () meters.
7. 120cm=( )m 3 yuan 6 points = () yuan.
8. () and () are special parallelograms.
9. The minimum number of decimal places is ().
10. The calculation of decimal addition and subtraction is the same as that of integer addition and subtraction, that is, align the same numbers, that is, put ().
1 1. The sum of the internal angles of acute triangle, right triangle and obtuse triangle is ().
12. An isosceles triangle with a base angle of 50? Its vertex angle is (), the side length of an equilateral triangle is 9 cm, and its circumference is () cm.
Second, judge right or wrong. (Correct type), 2 points will be deducted for each error type. *** 1 2 points)
1.Decimal is a number less than 1. ( )
2. Any triangle has at least two acute angles. ( )
3. Add 0 or delete 0 after the decimal point, and the decimal size remains unchanged. ( )
4. The bigger the triangle, the greater the sum of the internal angles. ( )
5. When calculating decimal addition and subtraction, align the last decimal place. ( )
6. Two groups of opposite sides of parallelogram are parallel respectively. ( )
Third, choose to fill in the blanks. (Fill in the serial number of the correct answer in brackets, 2 points for each small question, *** 12 points)
1. The integer part is two decimal places of 0, and the largest is ().
a、0 .0 1 B、0。 09 degrees Celsius. 9 days, 0.99.
2. The maximum counting unit of fractional part is ().
A, 1 B, one tenth of c, one percent.
3. The decimal rate between every two adjacent units is ().
One, one B, one C and one hundred.
All equilateral triangles are () triangles.
A, obtuse angle b, acute angle c, right angle
5. A triangle has at least () acute 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
Fourth, the operation problem is 6 points.
1. Draw an obtuse triangle and a parallelogram on the point diagram.
?
?
?
?
5. calculation. (***2 1 min)
1. oral calculation, (6 points)
1.5+0.5= 2. 1+0.6= 0.8-0.76=
2.38+0.7= 0.26-0. 12= 9.6-2.8=
2. Vertical calculation. (9 points)
5.32+ 14.89= 7.68-5.99= 50- 18.43=
3. Calculate by my favorite method. (6 points)
1 1.04+6.28+8.96+3.72 12- 1.25- 1.75 12x 4.8+5.2x 12
Six, column calculation (3 points for each small question, ***6 points).
(1) It is known that the sum of number A and number B is 20.58, and number A is 7. 86. What is the number B?
(2) It is known that the base angle of an isosceles triangle is 40? What is its vertex angle?
Seven, application questions 22 points
1. Mom spent 76.8 yuan on shopping in the supermarket, leaving 29.8 yuan. How much money did mom bring when she went shopping? 4 points
The circumference of an isosceles triangle is 30cm. If the waist length of a triangle is 8 cm, how long is the base of the triangle? Four points.
3. Dad tied the newspaper with two ropes with the length of 1.27m and 1.35m respectively. Use 0.25m rope at the interface. How long is the rope after connection? Five points.
The students have a long jump competition. In winter and winter, it jumped 3.16m, Liangliang jumped 0.23m more than in winter and winter, and Qiang Qiang jumped 0.18m less than Liang Liang. How many meters did Qiang Qiang jump? Five points.
5. In a right triangle, the acute angle is 30? What is the other acute angle? Four points.
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