1.4 decimeter = () meter 50 cm = () meter
5 yuan 4.3 points = () yuan 3 tons 25 kg = () tons.
4 of 2.4.807 is in () position, which means () (); 7 in the () position means () ().
The counting unit of 3.0.07 is (), and it has () such counting units.
4. The top angle of an isosceles triangle is 50 degrees, and the bottom angle is ().
5. The park is in the east of the supermarket, and the supermarket is beside the park (); Xiaoming's home is in the southwest of Wenfeng's home, and Wenfeng's home is in Xiaoming's home ().
6. A piece of wood is 2 1 meter long and sawed into a section of 3 meters long. It takes 6 minutes to finish sawing each section, and () minutes to finish sawing.
7. Triangle can be divided into (), () and () according to the size of the angle.
8. A number consisting of eight ones, five tenths and four thousandths. This number is written as () and pronounced as ().
9、a+b+c=a+( + ) (a+b)×c= × + ×
10, 1.96≈ (accurate to the tenth place) 2. 104≈ (keep two decimal places)
Second, the judgment question. (65438+ 0 points for each question, ***5 points)
There must be two equal angles in an isosceles triangle. ( )
12, remove the "0" after the decimal point, and the size of the decimal point remains unchanged. ( )
13、 125×(8×6)= 125×8× 125×6。 ( )
14, and the ratio between the two counting units is 10. ( )
15. If 65000 is rewritten as "1", then the number is 65000. ( )
Third, multiple choice questions. (65438+ 0 points for each question, ***5 points)
16. Among the following three numbers, the number with "0" removed without changing the size is ().
A, B, C, 0.45
The multiplication () applies to17,25×12-2× 25 = 25× (12-2).
A, commutative law b, associative law c, distributive law
18, no matter what triangle, there are at least () acute angles.
a、 1 B、2 C、3
19,46 □ 600 ≈ 470000, and the number that can be filled in □ is ().
a、0~4 B、5~9 C、 1~9
20, the following groups of line segments, can't form a triangle is ().
One piece, 2cm, 4cm, 3cm.
6 cm, 6 cm, 6 cm
C, 2 cm, 4 cm, 6 cm
Four, the calculation problem (38 points)
2 1, write numbers directly. (4 points)
22×4= 5× 12= 40×30= 90÷ 15=
4× 15= 0.32+0.68= 0.56-0.05= 8-5.6=
22. Calculate the following problems vertically and check them (4 points).
16.8+5.47 35× 16
23. Calculate the following problems with recursive equations. (12)
75+225÷(20-5) (46-32)×(7+25)
( 124-85)× 12÷ 13 235- 135÷5
24. How to calculate the following questions? (18)
125×32×25 32.62-2.25-3.75
146×34+34×54 85× 102
6000÷ 125÷8 672-36+64
Fifth, the operation problem. (4 points for each question, ***8 points)
25. Xiaoming starts from the gate of the park, walks 300 meters from east to north, then walks 200 meters to north, and finally reaches the destination 60 degrees and 200 meters from south to west.
26. Draw the height of the following figure.
Sixth, solve the problem. (1 and 2 questions 4 points, 3 questions and 4 questions 5 points, 5 questions 6 points, ***24 points)
27.(4 points)
Can you rank them according to their weight?
28. Look at the picture below to find the degree of ∠ 1∠2∠3. (4 points)
In the long jump, Xiaohua jumped 3.26 meters, Xiaodong jumped 0.4 meters more than Xiaohua, Xiao Qiang jumped 0.25 meters less than Xiaodong, and how many meters did Xiao Qiang jump? (5 points)
30. Xiaoming reads a 208-page science fiction novel. He read 17 pages every day for the first four days, and then read 20 pages every day. How many days can he finish it? (5 points) 1. The kindergarten teacher gave the children oranges. If everyone gets four oranges, there will be 1 1 more oranges. If everyone is divided into six parts, it will be less 13. How many children are there? How many oranges are there?
2. Pay 100 yuan for five stools and five chairs, and 6 1 yuan for two stools and five chairs. What's the unit price of stools and chairs?
There are 83 students in the fourth grade, among whom 5 girls and half boys take part in the math contest, and the rest are equal. How many more boys are there than girls in this grade?
3. Among the four formulas, 15x28X33, 9x35x88, 12x77x 15, 22x30x2 1, which formula has different results?
Fill in "greater than", "less than" or "equal to" in the first two questions to see what you can find, and then fill in the appropriate number in the last question. If you want to continue writing, can you still write?