2, () determine the position of the circle, () determine the size of the circle.
3. The side length of the cube is12cm. If the side length is expanded by 2 times, the sum of its side lengths will be expanded by () times, its volume will be expanded by () times and its surface area will be expanded by () times.
Class 1, Grade 6 of our school went boating in the West Lake. If there are eight people in each boat, that leaves four people. If each boat has 9 people, there will be 1 boat. There are () people in this class and () boats in this class.
5, 7× means (), 7× means ().
6, chickens and rabbits in the same cage, ***32 heads, 102 feet, ask () chickens, () rabbits.
7. The big clock in the square rings 5 times at 5 o'clock, which takes 8 seconds. 12 rings 12, which takes () seconds.
8.= ()% = (): () = () (decimal)
9. The ratio of A number to B number is 5: 8, A number is less than B number ()%, and B number is greater than A number ()%.
10, a number that increases 50% is 60, and this number is ().
1 1, a is less than b, b is 25% larger than c, and a is ()% of c.
12, a car goes from place A to place B, walks for 5 hours, and goes back for 4 hours. The speed of walking is ()% of the speed of returning.
13. In 2: 3, if 6 is added in the previous paragraph, the proportion should remain unchanged, and () should be added in the latter paragraph.
14, if the number of A is equal to the number of B, then the number of A is more than the number of B 12, and the sum of the 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 ().
Second, multiple-choice questions (10)
1, in sugar water containing 25% sugar, 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. If the ratio of number A to number B is equal to 6: 5, then number A is equal to number 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 Greater than the area of the inner circle ② Less than the area of the inner circle ③ Equal to the area of the inner circle.
5 The difference of the minuend ratio is much 125%, and the minuend is the minuend ().
① ② ③ ④
Iii. Calculation (12)
2. 1÷〔(3 -2)×〕 7÷4+0.25×3+
×〔 1+(6.5-2)÷ 1〕 〔+×(3- 1)〕÷ 1
Looking for the unknown X(8 points)
X-5X%= 17.5 7X+5×0.7=8
3x = 48 40 X = 3
Five graphics problems (10)
1 Find the area of the circle (as shown in the figure)
2 Find the shadow area (unit: cm)
Six application problems (30 points)
1 A chemical fertilizer factory produced a batch of chemical fertilizers and shipped them out in three times. The first batch is more than 200 tons, the second batch is the first time, and the third batch is 450 tons. How many tons of chemical fertilizer are there?
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?
The store distributes 320kg of oranges, apples and pears, and the ratio of oranges to apples is 5:6. The weight of pears is apples. How many kilograms are oranges heavier than pears?
The minute hand of the wall clock is 20 cm long. After 45 minutes, how far did the tip of this minute hand move?
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?
A barrel of oil weighs 23 kilograms. After removing 50% oil, the weight is 12kg. How many kilograms of oil are there in the barrel? How much does this bucket weigh?