The fourth grade of primary school, the second volume of mathematics examination paper topic
Fill in the blanks carefully first (65438+ 0 points per grid, ***23 points)
1, equilateral triangle has () axis of symmetry, isosceles trapezoid has () axis of symmetry, and circle has () axis of symmetry.
The highest digit of 2.4000709 is (), which is pronounced as (), where 7 is in (), which means (). 634,000 is () digit, and writing () is composed of () billion, () million and () one.
3. use? Wan? As a unit, write the divisor of 10 127000 as (), omit the mantissa after the highest bit of 945604, and write the divisor as ().
The multiplication of two numbers, A and B, is equal to 90. If a times 2 and b times 3, the product becomes ().
5. What is the degree of the inner angle of the triangle 100? This triangle is a triangle, and the base angle of the isosceles triangle is 65? The vertex angle is (), and each inner angle of an equilateral triangle is ().
6. The sum of the lengths of the upper and lower bottoms of the right-angled trapezoid is () cm.
Height () cm.
7. Xiaojun released 28? (□+2) Wrong to 28? □+2,
The result thus obtained is different from the correct answer ().
8. Fill it out regularly.
8547? 13= 1 1 1 1 1 1,
8547? 26=222222,
8547? 39=333333,
8547? ( )=( )
Second, the judgment is accurate (5 points) (correct in brackets? , wrong number? )
The stacking height of 1 and 1000 nickels is about 1 meter. In this way, the stacking height of 1000000 nickels is about 1 km. ? ( )
2. Two identical trapezoids can be combined into a parallelogram. ? ( )
3. Xiaoming's riding speed is 15km/h, Xiaohua's riding speed is 250m/min, and both of them are as fast. ( )
4、 125? 32? 25=( 125? 8)? (25? 4)( )
5. Three ropes with lengths of 5cm, 5cm and 1 1cm can form an isosceles triangle. ? ( )
Third, choose carefully (5 points) (put the serial number of the correct answer in brackets)
1, as shown on the right, a triangular piece of paper has one corner torn off.
It turns out that the shape of this paper is a triangle.
① isosceles triangle ② obtuse triangle ③ equilateral triangle
2.125+67+75 = 67+(125+75) Application ().
① additive commutative law's law of addition ③ additive commutative law's law of addition.
3. Little monkeys should enclose a piece of land, and the method of () is stronger.
① ② ③
4. When Mr. Wang goes to the mall to buy football, he needs to know how much he should pay with his relationship ().
① Unit price = total price? Quantity ② Total price = unit price? Quantity ③ Quantity = total price? unit price
5. The number of tourists in Wuxi Lingshan Giant Buddha Scenic Area is about 6.5438+0.6 million, and the most tourists on this day may be ().
① 165000 ② 159999 ③ 164999
Four, careful calculation (***28 points)
1, a number written directly. (4 points)
12? 300= 200? 34= 50? 1 10= 25? 18? 4=
600? 50= 400? 50= 26? 30= 147+256+353=
2. Use vertical calculation. (6 points)
28? 307= 760? 50= 400? 30=
3. Use a simple method to calculate. (18)
365+299 47? 9+47 25? ( 19? 8)
36? 102 63? 73-63? 63 42 1- 175-25
Five, the amount of painting (*** 13)
1. Draw the height on the bottom of the parallelogram first, and then measure the length and height of the bottom respectively. (4 points)
The bottom is () mm and the height is () mm.
2. Fill in the blanks with pictures as required. (9 points)
eight
seven
six
five
four
three
2
1
0 1 2 3 4 5 6 7 8 9 10 1 1 12 13 14 15
(1) Draw the other half of Figure ① to make it an axisymmetric figure.
(2) Translate Figure ② downward by 4 squares.
(3) Rotate Figure ③ clockwise by 90 degrees. After rotation, the position of point A is (,), the position of point B is (,), and the position of point C is (,).
Six, solve the problem (***26 points)
1, a book has 375 pages, 40 lines per page and 25 words per line. How many words are there in this book? (Do I have to write it out for use? Wan? For approximate number of units) (4 points)
2. Set up optical cable. It is planned to set up 600 meters every day. 12 days to complete the task, and it will be completed in 9 days. How many meters will be set on average every day? (4 points)
3. The weight of two baskets of fruits is * * * 150kg, and the first basket is lighter than the second basket 10kg. How many kilograms are there in each basket? (Draw first, then answer) (4 points)
4, a rectangle, if the length is increased by 6 meters, or the width is increased by 4 meters. The area has increased by 48 square meters. How many square meters was the original rectangle? (4 points)
5. Two engineering teams, Party A and Party B, jointly build a section of highway. Team A builds 70 meters and Team B builds 85 meters every day, which takes 1 1 day to complete. (6 points)
(1) How many meters is this road?
(2) How many meters is Team A shorter than Team B?
6. A line can form an isosceles triangle with a waist length of 15 cm and a base length of 24 cm. If an equilateral triangle is closed, what is the side length of the equilateral triangle? (4 points)
The answer to the second volume of the fourth grade mathematics examination paper in primary school
First, fill it out carefully.
1, 3, 1, countless.
2 million, 4709, 100, 700, 10, 6003004000, 603004000.
3. 10 130,000,900,000
4、540
5, obtuse angle, 50? ,60?
6、 14,7
7、54
8、52,444444
Second, accurate judgment.
1、?
2、?
3、?
4、?
5、?
Third, choose carefully.
1、①
2、③
3、②
4、②
5、③
Fourth, be careful.
1、3600,6800,5500, 1800,30000,8,780,756
2、8596,38000, 13 10
3、 365+299 47? 9+47 25? ( 19? 8)
=365+300- 1 =47? (9+ 1) =25? 8? 19
=765- 1 =47? 10 =200? 19
=764 =470 =3800
36? 102 63? 73-63? 63 42 1- 175-25
=36? ( 100+2) =63? (73-63) =42 1-( 175+25)
=36? 100+36? 2 =63? 10 =42 1-200
=3600+72 =630 =22 1
=3672
Fifth, the amount of painting
1、
The bottom is 23 or 24 mm and the height is 32 or 33 mm.
Step 2 sketch
(7, 1),(7,4),(9,4)
Sixth, solve the problem.
1、25? 40? 375
= 1000? 375
= 375,000? 380,000
2、600? 12? nine
=7200? nine
=800 meters
Step 3 sketch
The method of150+10 =160kg is not unique.
160? 2 = 80 kg second basket
80-10 = 70kg first basket
4、48? 4 = 12m
48? 6=8 meters
12? 8=96 square meters
5、( 1) 1 1? (85+70) (2) 1 1? (85-70)
= 1 1? 155 = 1 1? 15
= 1705m = 165m
6、 15? 2+24 = 54m