2、(? ) determine the position of the circle, (? ) determines the size of the circle.
3. The side length of a cube is 12cm. If the side length is doubled, the sum of the side lengths will be enlarged (? ) times, its volume will expand (? ) times, the surface area will expand (? ) times.
Class 1, Grade 6, our school went to the West Lake for a boat trip. If there are eight people on each boat, there are still four people left. If there are 9 people on each boat, there will be 1 boat left. This class has (? ) people, * * * have (? ) A boat.
5,7 x means (? ), x 7 means (? )。
6, chickens and rabbits in the same cage, ***32 heads, 102 feet, ask if there is (? ) A chicken, (? ) A rabbit.
7. The big clock in the square rings 5 times at 5 o'clock, 6 times every 8 seconds 12. It needs (? ) seconds.
8、=(? )%=(? ):(? )==(? ) (decimal)
9. The ratio of A to B is 5: 8, and A is less than B (? )%, quantity b is greater than quantity a (? )%。
10, a number that increases by 50% is 60, and this number is (? )。
1 1, a is less than b, b is more than C 25%, and a is c (? )%
12, a car goes from place A to place B, the journey takes 5 hours and the return journey takes 4 hours. The speed of going is the same as that of returning. )%? .
13, at 2: 3? If you add 6 in the previous paragraph, the ratio should remain unchanged, while (? )。
14. If the number of A equals the number of B, the number of A is more than the number of B 12? , the sum of two numbers is (? )。
15 A is greater than B, then B is less than A (? )。
16? Divide the one-meter-long rope into three sections on average, and each section is full-length (? )。
Second, multiple-choice questions (10)
1, sugar content 25%? In sugar water, the ratio of sugar to water is (? )。
① 1:3? ② 1:4? ③ 1:5
2. Among the following three questions, the formula with the largest result is (? )
① 1999÷? ②? 1999×? ③ 1999×
3. Is the ratio of number A to number B equal to 6: 5? , then the number of a equals the number of b (? )。
①? ②? ③? ④
4, a circle, its outer circle diameter is twice the diameter of the inner circle, the area of the circle (? )。
(1) is larger than the inner ring area? ② Less than the area of the inner circle? ③ Equal to the area of the inner circle.
5 The minuend is more than the difference 125%? , reduced to the minuend (? )。
①? ②? ③? ④
Four? Find the unknown X(8 points)
X-5X%= 17.5？ 7X+5×0.7=8
3X÷=48？ 40 X = 3
Five? Graphic problem (10)
1 Find the area of the circle (as shown in the figure)
2? Find the shadow area (unit: cm)
Six? Application problem (30 points)
1? A chemical fertilizer factory produced a batch of chemical fertilizers, which were shipped out in three times. The first batch is more than 200 tons, the second batch is the first and the third batch is 450 tons. How many tons are there in this batch of fertilizer?
2. It takes one worker to complete a project alone 12 days, and Party A and Party B can cooperate for 8 days to complete it. How many days does it take for Party B to finish it alone?
3? The store shipped 320kg of oranges, apples and pears, and the ratio of oranges to apples was 5:6. The weight of pears is apples. How many kilograms are oranges heavier than pears?
4? The minute hand of the wall clock is 20 cm long. After 45 minutes, how many centimeters did the tip of this minute hand walk?
When water turns into ice, its volume increases. There is a piece of ice with a volume of 2 cubic decimeters. What is the volume after melting?
6? A barrel of oil weighs 23 kilograms. After removing 50% oil, the weight is12kg. How many kilograms of oil are there in the barrel? How much does this bucket weigh?
Answer supplement
(1) Fruit shops import 390kg of apples, bananas and pears a day. The weight of apples is 1.5 times that of pears, and the weight of bananas is 3/4 of that of pears.
(4) The school bought a batch of books and distributed them to all classes. If each class is divided into 25 books, there will be 22 more books. If each class is divided into 30 books, there will be 68 books missing. How many classes are there? How many books did you buy?
(5) The fruit company stores a batch of apples, and after selling 30%, it delivers 160 boxes, which is more than the original apples110? How many boxes of apples are there at this time?
(6) The greening team rebuilt the garden in the center of the street and used it in 900 yuan. Compared with the original plan, it saves 300 yuan and a few percent. & lt/P & lt； ? p & gt
(7) A highway maintenance team built a highway as planned.
Calculation problem: (***30 points)
1, a number written directly. (65438+ 0 point for each question)
26×50=? 25×0.2= 10-0.86=24×? =
÷3= 125%×8=? 4.8÷0.8=8÷? =
12×(? +? )=? 1- 1÷9=2.5×3.5×0.4=
2. Off-mold calculation. (2 points for each question)
0.25×+? 2.5%9.6- 1 1÷7? +×4
(2)
3. Solve the ratio and equation. (2 points for each question)
5.4+2X？ =? 8.62.5:5? =? x:80.2？ =? 1-? X24
4. Column calculation. (3 points for each question)
(1) 180 is more than 50% of 10. What's this number?
(2)0. 15 divided by? Quotient plus 5 times? What is the product?
Repairing 200 meters a day, in fact, repairing 50 meters more every day, leading to the completion of the task three days ahead of schedule. What is the total length of this highway?
(8) There is a rectangular ingot with a circumference of 2m at the bottom and an aspect ratio of 4: 1, which is 25% less. Can be cast into a cone with a height of 3 meters. What is the bottom area of the cone?
1.3/7 × 49/9 - 4/3
2.8/9 × 15/36 + 1/27
3. 12× 5/6 – 2/9 ×3
4.8× 5/4 + 1/4
5.6÷ 3/8 – 3/8 ÷6
6.4/7 × 5/9 + 3/7 × 5/9
7.5/2 -( 3/2 + 4/5 )
8.7/8 + ( 1/8 + 1/9 )
9.9 × 5/6 + 5/6
10.3/4 × 8/9 - 1/3
1 1.7 × 5/49 + 3/ 14
12.6 ×( 1/2 + 2/3 )
13.8 × 4/5 + 8 × 1 1/5
14.3 1 × 5/6 – 5/6
15.9/7 - ( 2/7 – 10/2 1 )
16.5/9 × 18 – 14 × 2/7
17.4/5 × 25/ 16 + 2/3 × 3/4
18. 14 × 8/7 – 5/6 × 12/ 15
19. 17/32 – 3/4 × 9/24
20.3 × 2/9 + 1/3
2 1.5/7 × 3/25 + 3/7
22.3/ 14 ×× 2/3 + 1/6
23. 1/5 × 2/3 + 5/6
24.9/22 + 1/ 1 1 ÷ 1/2
25.5/3 × 1 1/5 + 4/3
26.45 × 2/3 + 1/3 × 15
27.7/ 19 + 12/ 19 × 5/6
28. 1/4 + 3/4 ÷ 2/3
29.8/7 × 2 1/ 16 + 1/2
30. 10 1 × 1/5 – 1/5 × 2 1
3 1.[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)
32.5+2 1*8/2-6-59
33.68/2 1-8- 1 1*8+6 1
34.-2/9-7/9-56
35.4.6-(-3/4+ 1.6-4-3/4)
36. 1/2+3+5/6-7/ 12
37.[2/3-4- 1/4*(-0.4)]/ 1/3+2
38.22+(-4)+(-2)+4*3
39.-2*8-8* 1/2+8/ 1/8
40.(2/3+ 1/2)/(- 1/ 12)*(- 12)
4 1.(-28)/(-6+4)+(- 1)
42.2/(-2)+0/7-(-8)*(-2)
43.( 1/4-5/6+ 1/3+2/3)/ 1/2
44. 18-6/(-3)*(-2)
45.(5+3/8*8/30/(-2)-3
46.(-84)/2*(-3)/(-6)
47. 1/2*(-4/ 15)/2/3
48.-3x+2y-5x-7y
49.2/3÷ 1/2- 1/4×2/5
50.2-6/ 13÷9/26-2/3
5 1.2/9+ 1/2÷4/5+3/8
52. 10÷5/9+ 1/6×4
53. 1/2×2/5+9/ 10÷9/20
54.5/9×3/ 10+2/7÷2/5
55. 1/2+ 1/4×4/5- 1/8
56.3/4×5/7×4/3- 1/2
57.23-8/9× 1/27÷ 1/27
58.8×5/6+2/5÷4
59. 1/2+3/4×5/ 12×4/5
60.8/9×3/4-3/8÷3/4
6 1.5/8÷5/4+3/23÷9/ 1 1
62.3/7 × 49/9 - 4/3
63.8/9 × 15/36 + 1/27
64. 12× 5/6 – 2/9 ×3
65.8× 5/4 + 1/4
66.6÷ 3/8 – 3/8 ÷6
67.4/7 × 5/9 + 3/7 × 5/9
68.5/2 -( 3/2 + 4/5 )
69.7/8 + ( 1/8 + 1/9 )
70.9 × 5/6 + 5/6
74.8 × 4/5 + 8 × 1 1/5
76.9/7 - ( 2/7 – 10/2 1 )
77.5/9 × 18 – 14 × 2/7
78.4/5 × 25/ 16 + 2/3 × 3/4
79. 14 × 8/7 – 5/6 × 12/ 15
80. 17/32 – 3/4 × 9/24
8 1.3 × 2/9 + 1/3
82.5/7 × 3/25 + 3/7
83.3/ 14 ×× 2/3 + 1/6
84. 1/5 × 2/3 + 5/6
85.9/22 + 1/ 1 1 ÷ 1/2
86.5/3 × 1 1/5 + 4/3
87.45 × 2/3 + 1/3 × 15
88.7/ 19 + 12/ 19 × 5/6
89. 1/4 + 3/4 ÷ 2/3
90.8/7 × 2 1/ 16 + 1/2
9 1. 10 1 × 1/5 – 1/5 × 2 1
92.4.38 ÷ (36.94 + 34.3×0.2)
93.[(5.84 - 3.9 ) ÷0.4 + 0. 15] ×0.92
94.[7.6 - 5 ×(0.3 + 0.9)]÷ 10
95. 1.8×( 1.4 - 0.26 ÷2)
96.0.27 ×99 + 0.27
97.8 -0.8 ÷5+0.24 ×9 1. A PLA unit has to March 502 kilometers every day and start walking 60 kilometers. After walking for 3 days, the remaining distance per day is 20.5 kilometers. How many days will it take? ?
The rice in bag a weighs 68kg. After pouring 15kg from bag A into bag B, bag A is 5kg heavier than bag B ... How many kilograms of raw rice is there in bag B? ?
A steel mill produces 830 tons of steel every day for the first 3 days and 850 tons every day for the next 5 days. How many tons of steel is produced on average every day? ?
The motorcyclist traveled 60 kilometers at the speed of 20 kilometers per hour, and came back 30 kilometers per hour. What is the average speed of going back and forth? ?
5. Workers in the first workshop of a machine tool factory use 18 lathe to produce 720 machine parts in two hours. How many machine parts do 20 such lathes produce in three hours? ?
6. You can make120kg tofu with 30kg soybeans. According to this calculation, how many kilograms of soybeans do you need to make 600 kilograms of tofu? ?
An express train and an ordinary bus leave from two cities at the same time. The speed of express train is 90 kilometers per hour, and that of ordinary bus is 48 kilometers per hour. Two and a half hours later, two trains met on the road. How many kilometers is the railway between city A and city B? ?
8. The distance between the two places is 28 kilometers, and two cars, A and B, drive in the same direction from both places at the same time. A car travels 25 kilometers per hour, and B car travels 32 kilometers per hour. Car A is in the front and car B is in the back. How many hours will car B catch up with car A? ?
9. Cut a rectangular piece of paper with a length of 90 cm and a width of 20 cm into several square pieces of paper with the same size. It is required that the side length of the square is the largest, so as not to waste paper. How many squares can you cut? ?
10. In order to green the highway, the Bureau of Landscape Architecture planted a tree every 4 meters on both sides of a section of highway, and planted 74 trees at a time. Now it plans to plant a tree every 6 meters. So, how many trees will not be transplanted? ?
1 1, Party A has 14.8 yuan and Party B has 15.2 yuan. They want to buy a football together. The price of a football is twice their money. How much is a football? How much are they short of? ?
12. A machine plows 15 hectares in 3 hours. According to this calculation, how many hours does it take for five machines to plow 75 hectares? ?
13. There are 14 boxes of duck eggs in the store. Sold 250 kilograms, leaving 4 boxes of 20 kilograms. How many kilograms are there in each box of duck eggs? ?
14. bright primary school donated books to mountain students, with 240 books in grade four, twice as many as in grade five, and more books in grade six than in grade five 120. How many books did he donate per grade on average? ?
15. The grain store delivered 20 bags of rice and 20 bags of flour, each of which was 90kg of rice and 25kg of flour. How many kilograms more rice is brought in than flour? (two ways to answer)?
16. Two ropes * * * are 48.4m long. After cutting 6.4 meters from the first rope, the second rope is 6 meters more than the remaining two of the first rope. How long are the two ropes? ?
17. Students in Grade 4 and Grade 5 collect tree species, and the students in Grade 4 collect tree species 18.6 kg, and the students in Grade 4 collect 2.5 kg less than those in Grade 5. How many kilograms of tree species were collected in the second grade? ?
18. A workshop used to use 2450 kilowatts of electricity every month &; #8226; At that time, after carrying out the saving activities, the electricity consumption of the original year can now be increased by two months. How many kilowatts does this workshop save electricity on average every month? #8226; What time? ?
19. The students took part in tree planting activities. 96 students in Grade 4 * * *, each of whom planted 3 trees. There are 87 people in the fifth grade, each of whom planted 4 trees. How many more trees were planted in the fifth grade than in the fourth grade? ?
20. Six students in the first group scored 86, 79, 98, 100, 89 and 94 respectively in the math test. What is their average score? ?
2 1. The car travels for 3 hours 135km, and the plane is 28 times faster than the car and flies 60km less. How many kilometers does this plane fly per hour? ?
A clothing factory produced 850 suits in five days. According to this calculation, how many suits are produced a month? (30 days a month)?
23. The store delivered 8 baskets of apples, 12 baskets of pears, 38 kg of apples and 42 kg of pears in each basket. How many kilograms of fruit did this shop ship?
There are two construction teams. Team A stores 64 bags of cement and Team B stores 1 14 bags of cement. After that, Team A shipped 18 bags every day, and Team B shipped 8 bags every day. A few days later, Team B had twice as many cement bags as Team A? ?
Liu Ming goes to school at half past seven every morning. On the first day, he walked 40 meters per minute and was 7.5 minutes late. Walking 60 meters per minute the next day, I arrived five minutes early. How far is Liu Mingjia from school? When does she have class?
3X+5X = 48 14X-8X = 12 6 * 5+2X = 44？
20X-50 = 50 28+6X = 88 32-22X = 10？
24-3X = 3 10X *(5+ 1)= 60 99X = 100-X？
X+3 = 18 X-6 = 12 56-2X = 20？
4y+2=6 x+32=76 3x+6= 18？
16+8x=40 2x-8=8 4x-3*9=29？
8x-3x= 105 x-6*5=42 x+5=7？
2x+3 = 10 12x-9x = 9 6x+ 18 = 48？
56x-50x=30 5x= 15 78-5x=28？
32y-29=3 5x+5= 15 89x-9=80？
100-20x = 20 55x-25x = 60 76y-75 = 1？
23y-23 = 23 4x-20 = 0 80y+20 = 100？
53x-90 = 16 2x+9x = 1 1 12y- 12 = 24？
80+5x = 100 7x-8 = 6 65x+35 = 100？
19y+y = 40 25-5x = 15 79y+y = 80？
42x+28x = 140 3x- 1 = 8 90y-90 = 90？
80y-90 = 70 78y+2y = 160 88-x = 80？
9-4x = 1 20x = 40 65y-30 = 100？
5 1y-y = 100 85y+ 1 =-86 45x-50 = 40
98.0.25× 1.25×40×8
99.(0.25 + 2.5 + 25)×0.4
100.8.4 + 7.66 + 2.34 + 1.6