1. Fill in ">"
( ) 16 ( )23 ( ) ( )
2. The reciprocal of15 is (), and the reciprocal is ().
3. Divide 4.5% into () and define it as 0.3 ÷ 35 = 0.55-512 = 5144×12 = (4.2+34 )× 2× 0 =.
3.7+5=8.7 300×0.3%= 0.9 4 15 × 14 = 3× 1 12 +3× 12 =
Two. Fill in the blanks: 20%
1, 27 × 10, 12×29.
2, 79 is 1 12 () () 4 12 is 1 14.
3. The largest three digits are less than the smallest four digits ()%, and 1.2 is greater than its reciprocal ().
4、0.25=( )8 =( )%=( )÷ 16
5. The angle that is 20% smaller than the right angle is () degrees.
6. The number of A is less than that of B 14, and the number of B is more than that of A ().
Among 7.67%, 23, 0.67 and 0.67, the order from big to small is
()& gt()& gt()& gt( )
8. Draw the largest circle in a rectangle with a length of 8 cm and a width of 6 cm. The area of this circle is.
9. If the number A is 45 of the number B, the ratio of A to B is, and the ratio of B to the sum of A and B is.
10, the ratio of the three internal angles of the triangle is 2:3:4, and the degrees of these three internal angles are respectively
Degree, degree, degree.
1 1, 1.2 tons: 350 kg is the ratio.
12, 1 10 hour = () minutes 3 125 kg = () tons.
Third, true or false: 4%
1. All the 98 parts manufactured by Master Wang are qualified, and the qualified rate is 98%. ( )
2. The reciprocal of1is greater than the reciprocal of 2. ( )
3. A wire is 8 meters long, 58 meters away, and there are 3 meters left. ( )
4. 35% of1ton is 35% ton. ( )
Fourth, multiple choice questions. 5%
1, the number of A is twice that of B, and A is more than B ().
a、50% B、 100% C、200%
2. 75% of a number is equal to 35 of b number, while a number () b number.
a、gt； b 、& ltc 、=
3. Add 10g salt to 150g water, and the salt accounts for () of the brine.
a、 1 15 B、 10% C、25%
4. Cut the 5-meter-long rope into 6 sections on average, each section is () meters long.
a、 16 B、56 C、 1 15
5. The radius of the circle is enlarged by 3 times, and the area is enlarged ()
A, 3 times b, 6 times c, 9 times
V. Calculation (simplified to simplified) 12%
( 1)3 14 × 1523 – 1.25× 1523 (2) 756 +39 10 +2 16 +6. 1
(3) 3-(45 ÷623 +225 ) (4) 9920 ÷[(38.02+ 1.98) ×0.5]
Fourth, solve the equation: 6%
5.5-χ=234 χ: 0.75=56 2χ+30%χ=9.2
Sixth, drawing questions. 5%
Make a semicircle with a diameter of 4 cm and find the circumference of this semicircle.
Seven. Formula calculation: 12%
What is the 20% of 1 and 45? 2. A number 16 is exactly 24. What's this number?
3. 23 of a certain number is exactly 40% of 3 13, 4,78 times 6.4 plus 30% of 2.4.
Find a number. What's the total?
Eight, application questions: 32% (the seventh question is 2 points)
1. Dig a 24-kilometer canal. 25% of the total length was dug in the first week, and the rest was dug in the second week. How many kilometers were dug in the second week?
2. Squeeze 1440 kg soybean oil with 4000 kg soybean to find the oil yield of soybean.
3. A factory used 5400 tons of water in the second half of April, saving 20% compared with the first half. How many tons of water were used in the first half of the year?
Last year, the washing machine factory produced 5400 washing machines, 600 more than planned, which actually increased by several percentage points?
The radius of the train driving wheel is 0.75 meters. If it rotates 300 times per minute, how many meters per hour is feasible?
6. It takes 15 hours for the master to complete a project, and 18 hours for the apprentice to complete it. Now the master will do it for five hours, and the apprentice will do the rest. How many hours will it take to complete?
7. The father is 43 years old and the daughter is 1 1 year old. A few years ago, my daughter was 20% older than my father.
Additional questions, open questions 10%
There are two pieces of wood, 30 decimeters and 80 decimeters in length. Now we have to saw them into small pieces of the same length (decimeter of each length is an integer), and there can be no extra. How many decimetres is each piece? The decimal is ().
4. In order from small to large.
( )
5.5∶( )。
The ratio of 6. ∴3 is (), and the simplified ratio is ().
7. Put 10g salt into 10g water, and the ratio of salt to brine is ().
8. The ratio of A to B is 0.6, and the ratio of A to B is ().
9. The diameter of a circle is 10 decimeter, the circumference is () decimeter, and the area is () square decimeter.
10. When the radius of a circle is () cm, its area and circumference are equal.
Two. Judgment (mark "√" for the right and "×" for the wrong, with 2 points for each item, *** 10).
1. When the ratio of the number of girls to the number of boys in a class is 2: 3, the number of girls accounts for the whole class. ( )
2. Because the reciprocal of 1 is 1, the reciprocal of 0 is 0. ( )
3.3 meters equals 1 meter. ( )
A circle has countless axes of symmetry. ( )
5. The angle of the vertex on the circle is called the central angle. ( )
Third, carefully calculate (26 points) 1. Write numbers directly (10 points)
2. Calculate the following problems (simplify if it can be simplified, 16 points)
① ② ③ ④
Four, draw a picture, calculation (6 points)
Please show the number of this rectangle in the rectangle below.
The formula is () () = ()
V. Answering questions (30 points)
1. 500 kernels of corn were used for germination test, 15 kernels did not germinate. What is the germination rate?
2. Build a canal, which has been completed, with 18km left. How long is this canal?
3. For a section of expressway, if it takes 20 days for Team A to maintain alone and 30 days for Team B to maintain alone, how many days will it take for Team A and Team B to maintain together now?
4. Xiaoli's mother deposited 5000 yuan in the bank, calculated at the annual interest rate of 2.05%, and deducted 20% interest tax after two years, how much principal and interest can she get?
36 tons of goods have been piled up in the warehouse and have been shipped away. How many tons are left?
6. A round flower bed with a diameter of 6m is built around the flower bed, with a path with a width of 1 m.. How many square meters is the area of this path?
Six, open questions (8 points)
Which of the following figures is axisymmetric? Please draw their symmetry axes.
answer
I. 1. < > = > 2.3 3.0.045 4.
5.8 3 25 20 6. Or 0.251:47.1:18.3: 59.31.478.510.2.
Two. 1 .× 2 .× 3.√ 4.√ 5 .×
Three, 1.
2.① ② ③ ④