Su Jiaoban fifth grade next semester mathematics midterm examination paper 20 12.4
Class: Name: Score:
First, think carefully and fill in the blanks carefully. (65438+ 0 points per grid, 40 points)
1, km means (0.4) and ().
2. Fill in the simplest score in brackets.
20 seconds = (0.2) minutes 48 cm = (0.48) m 1 hour = () days.
50m = () km 600g = () kg15min = ()
3. In, when it is (), it is a true score; When it is (), it is a false score;
When it is (), it doesn't mean anything.
4. Fraction, when b is (), it is the decimal unit of this fraction; When b is (),
Is the biggest real score; When b is (), it is the smallest mistake; When b is (),
Is the smallest band fraction; When b is (), its value is the smallest composite number; When b is ()
, its score value is 0; When b is (), its score value is 3; When b is ()
Its value is the smallest prime number.
Step 5 use "?" Box 5 number on the calendar card (as shown on the right).
The middle number is 10, and the sum of these numbers is 50. If the sum of these five numbers is
100, and the middle number is (). Move "?" On the calendar card,
These five numbers have () different sums.
6. The picture on the left shows the process of Mr. Cheng downloading a file on the computer.
Teacher Cheng still has some files to download.
7. Divide 5 tons of goods into 4 parts, each of which accounts for () of the total weight, and each part weighs () tons.
8. Divide a 5-square-meter round flower bed into four pieces of equal size, each piece occupying the flower bed, each
This block is 100 square meter.
The least common multiple of 9, 8 and 12 is (), and the greatest common factor of 19 and 57 is ().
10, a bag of rice ate 45 Jin, and there were 55 Jin left. This bag of rice has been finished. Is there any left?
There's food.
11,△△□☆★△□☆★△△□☆ ★ ... The 30th from the left is (), * * * has.
() such pictures and texts. If there are 100 such graphs, the number of △ accounts for the total.
12, Xiao Tong's position in the classroom is (3, 4), and he sits in row (), the first row ().
Column.
13, if 4x = 30, then 3x+5.5= = ().
14. Xiaoming spends 25 minutes doing his Chinese homework at 6: 30 every night, accounting for one hour. Do math homework
It takes 15 minutes, accounting for one hour. It takes 10 minutes to do English homework, accounting for one hour.
15, it is known that both A and B are non-zero natural numbers, and B÷5=A, then the greatest common factor of A and B is ().
The least common multiple is ().
16, 1 and 2 buses leave from the departure station at 6: 00 in the morning, and 1 bus leaves every five hours.
Bus No.2 is allocated to every eight buses. The second time when the two cars leave at the same time is ().
Second, repeatedly scrutinize and accurately judge. (2 points for each small question, 12 points)
1, A, B two piles of coal, A pile uses tons, B pile uses it, then the remaining two piles of coal are equal. ( )
2. Divide a rope into five sections, each section is meters. ( )
3. The score greater than the small ratio is only. ( )
One meter is as long as three meters. ( )
5. If it is known whether it is a false score or a true score, it must be 7. ( )
6. When the solution is -7.8 = 14.3+7.8, 7.8 should be subtracted from both sides of the equation. ( )
Third, the right choice. (2 points for each question, 6 points)
Add 8 to the numerator of 1. To keep the original decimal value unchanged, add () to the denominator.
a、8 B、 12 C、 18 D、24
2. The greatest common factor of two numbers is 2 and the smallest common multiple is 48. These two numbers may be ().
A, 6 and 12 B, 6 and 16 C, 6 and 18 D, 6 and 24.
3. Divide 5 km into 6 parts, each part is ().
A, km b, km c, total length d, total length
Fourth, calculate carefully and avoid carelessness. (For the third question, 3 points will be given for each minor question, and the rest will be 1 point, that is, 14 point).
1. Decimal the following numbers (including fractions), and turn integers into fractions with the specified denominator.
0.6= 1.3=( ) 18= 12=
2. Turn the following false score into a fraction and turn the fraction into a decimal.
= = 40 = 7 =
3. Solve the equation.
x-270=840
Fifth, the operation problem. (12)
1, and points on the lower axis are expressed as fractions. Fill in fractions above the axis and decimals below the axis. (4 points)
2. Look at the picture and answer the questions.
(1) Use number pairs to represent the four parallelograms in the diagram.
The position of the vertex. (2 points)
(2) If the parallelogram is translated to the left by 7 squares,
The four parallelograms after translation are represented by number pairs.
Vertex A/(2 points)
(3) Rotate the parallelogram anticlockwise for 90 degrees each time around point A, and draw the figures after the first, second and third rotations respectively. (2 points)
(4) C 1, C2 and C3 respectively represent the rotated position of point C, and they are represented by number pairs; Then connect C, C 1, C2, C3 and C in turn to see what the figure is. (2 points)
Sixth, it is never too old to learn. (*** 16)
1. The triangle has an area of 360 square centimeters and a height of 16 centimeters. How many centimeters is the bottom edge? (4 points)
2. There is an 8-meter-long red ribbon, just enough to knit 18 Chinese knots of the same size. Every Chinese knot is red.
How many meters is the ribbon? How many red ribbons are used in each Chinese knot? (4 points)
There are two ropes, one is 42 meters long and the other is 48 meters long. Now cut them into the same length.
Small paragraphs, each paragraph as long as possible, not redundant. How long is each rope? A * * * can be cut into many pieces.
Less? (4 points)
4. A character's expression pattern paper (as shown below). Xiao Ming wants to tear up two connected patterns. Please help him.
Let's see how many different tearing methods there are. (4 points)
Seven, improve intelligence. (1 ~ 3 questions are empty 1 point, the fourth question is 2 points, 10 point)
1, the fire alarm number is (), the emergency number is (), and the public security calls the police.
Telephone (1 10), and the postcode of your school is ().
2, a = 2× 3× N2, b = 3× n3× 5, (n is a prime number), then the greatest common divisor of a and b numbers is
(), the least common multiple is ().
3. If a △ b = ab-a, then 3 △ 8 = (); 4△(8△9)=( )。
4. There are 36 pencils and 46 exercise books, which are awarded to several three-good students on average. The result is an extra pencil and exercises.
Three exercise books are missing. A * * *, how many students are there?
Friendly reminder: please learn to check the test paper after you finish the questions. I wish the students excellent grades! )