First, read the questions carefully and think about filling in the blanks. (every grid 1 minute, 24 points)
1. When calculating 2 160 ÷ 20-57 with a calculator, press 2 160 on the keyboard, then press ÷, then press 20, and then press ÷-÷, and the screen will display ().
2. Five digits are rounded to10,000, and the digit is 80,000. The maximum value of this five-digit number is () and the minimum value is ().
3. "Little Carelessness" miscalculated 28×(□+2) into 28×□+2, so the result is different from the correct answer ().
420.68 billion yuan (), rewritten as "ten thousand" as the unit number is () ten thousand, and "hundred million" as the unit divisor is () hundred million.
5. In the formula □ 12÷53, let the quotient be two digits, and □ minimum fill (). To make the quotient a single digit, fill in () at most.
6. The algorithm represented by (a+b)+c = a+(b+c) is (); The commutative law of multiplication is written in letters as ().
7. Write 16×5=80 and 260+80 = 340 into a comprehensive formula (), and the result of this comprehensive formula is ().
8. There are () among △△△△△△△△χ, 12 deltas; The 16 position is ().
9. The area of a square with a side length of 24 cm is () square centimeters. If the area of this square is equal to the area of a rectangle with a width of 9 cm, then the length of this rectangle is () cm.
10 and 3 o'clock, the angle between the hour hand and the minute hand is () degrees, and at 7 o'clock, the smaller angle between the hour hand and the minute hand is ().
1 1, the number of a is three times that of b, and the quotient of a divided by b is (); If the number A is reduced by 5 times, the number B should be () to keep the quotient unchanged.
12. The following objects consist of four and five cubes of the same size.
The shapes seen from () and () are the same. The shapes seen from the () plane are different.
Second, smart little judge. (Draw "√" correctly and "×" incorrectly) (5 points)
1、4800÷900=5……3。 ( )
2. Rectangular and square are special parallelograms. ( )
A right angle is a straight line. ( )
4.8 10÷5=(8 10×2)÷(5×2)。 ( )
When you observe an object, you may see the same shape in the same position in different postures. ( )
Third, sit in the right position. (Fill the serial number of the correct answer in brackets) (5 points)
1, in the following figures, only one zero is ().
①93000006 ②9030600 ③93006000
2. look at a 30 with a magnifying glass with a magnification of 100 times? Angle, the degree of angle is ().
①300? ②30? ③3000?
3. If A×40=360, then A×4= ().
①3600 ②360 ③36
4. Five cubes of the same size are combined into a figure, and at least () squares can be seen from any position. ① 1 ②2 ③3
5. Two people take turns throwing small cubes, and it is agreed that red face up A wins 1 minute, and yellow face up B wins 1 minute. It is fairest to use the () cube below.
①2 red 1 blue 1 green 2 yellow 23 red 1 green 2 yellow 3 1 red 3 blue 2 yellow.
Fourth, be careful.
1, write the result directly. 6 points
4500 ÷ 15 = 530,000- 180,000 = 140×60=
7200÷90= 645÷79≈ 98× 102≈
2. Write the following questions. 12 point
174÷29 408× 16 766÷36
9 18÷25 540×25 1508÷29
3. Calculate the following questions. (If it is simple, it should be calculated by a simple method) (3 points for each question, 12 points)
800-600÷20 35× 18 329- 186- 14 25×37×4
Five, according to the requirements of the drawings. (3 points)
(1) Take B as the endpoint and make a ray through point C;
(2) Connect point A and point C;
(3) Make a line parallel to AC when crossing point D (two endpoints are on BA and BC respectively).
Answer.
d。
B.
c。
Six. Carefully organize detailed questions and answers (5 points)
The Children's Palace held an exhibition of fine arts and calligraphy works for primary school students. The number of various works is as follows: 30 watercolors, 50 crayons, 36 brushes and 45 pens. Complete the bar chart below according to these data.
Statistics on the number of exhibitions of primary school students' art calligraphy works
time
Step into life and show your talents. (28 points)
1, the school launched water-saving activities, saving 435 tons of water in the first three months. According to this calculation, how many tons of water can the school save a year? (4 points)
2. 328 fifth-grade students from Chengguan Primary School visited the Agricultural Science and Technology Demonstration Park, and 48 students have visited it. The rest take a bus for every 20 people. How many buses do you need? (4 points)
Thirty-six students and two teachers from Class Four (2) visited the park.
(1) Before them, a family of three (two adults 1 child) bought tickets and used 38 yuan. Known adult ticket 1 ticket 15 yuan. Do you know how much a child ticket 1 ticket costs? (3 points)
(2) Now the teachers take out 300 yuan to buy tickets. Is that enough? (Answer after calculation) (3 points)
The students visited the Science and Technology Museum. There are 45 students in grade four, and the number of students in grade five is three times more than that in grade four. 12. How many people are in the second grade? (4 points)
Master Wang produced 640 parts in 8 hours, and Li Shifu produced 520 parts in 4 hours. How many parts does Master Wang produce less per hour than Li Shifu? (5 points)
6. A factory produces white sugar 18 days and brown sugar 12 months 13 days. White sugar 16 tons and brown sugar 12 tons can be produced every day. How many tons of white sugar is more than brown sugar? List the conditions first, then answer. (5 points)
Students, have you finished all the questions? Can we check it again? I believe you will be able to hand in a satisfactory answer sheet!