1, a number has millions of digits 8, millions of digits 9, thousands of digits 5, tens of digits 4, and the rest digits are all zeros. This number is written as (), and the mantissa after omitting ten thousand digits is about () ten thousand.
2. The decimal unit of1is (), and the decimal unit like () is the smallest prime number.
3. A number is 20, and 20% of this number is ().
4. The ratio of1.75: 2.25 to the simplest integer is (), and the ratio is ().
5. The ratio of basketball, volleyball and football is 5: 3: 2, with basketball accounting for the total, volleyball accounting for the total and football accounting for the total; Basketball is volleyball, not football; Volleyball is basketball, not football; Basketball is more common than volleyball, and football is less.
6. When the side length of a square is increased by 10%, the area is ()% of the original.
7. It takes 2 hours for Party A and 3 hours for Party B to take the same road. Party A is faster than Party B. ..
8、2÷5 = = =( ) :( )=( )%
9. 1.2 hours = () hours () minutes 6.2 hectares = () square meters.
10, the number of A is A, the number of B is 0.3 less than three times that of A, and the number of B is ().
Second, judge. (Mark "√" for the right and "×" for the wrong) (8 points)
The product of 1 and two numbers must be greater than one of the factors. ( )
2. Divide 0 by any number to get 0. ( )
The approximate value of a number is 10000, and the maximum number is 9999. ( )
4. If A ÷ B = 2... 1, then (5a) ÷ (5b) = 2... 1 ().
Third, choose. (Fill in the serial number of the correct answer in brackets) (10)
1, the triangle has at least () acute angles.
a、 1 B、2 C、3
2, a rectangle, the length increases, the width increases, and its area increases ().
A, B, C,
3. Compare the sum of four true scores with their products, which is greater? ( )
A, product big B, and big C, not sure.
4. Divide the one-meter-long wire into four sections on average, and each section is longer than the original wire ().
A, B, C,
5. Enlarge the radius of the bottom of the cylinder by 2 times, and the volume of the cylinder will increase by () times under the condition of constant height.
a、4 B、7 C、8
Fourth, the calculation problem. (4 points+12 points+12 points +4 points = 32 points)
1, a number written directly.
36×25% = 7.2×0.09 = 5.7+4.3 =
18÷ 1% = 6.4-4.76-0.24 =
2. Off-mold calculation.
1005÷[42×( - )] 5.6×0.7+0.2×5.6+0.56
3. look for the unknown.
6.8+3x = 2 1.8
8.25-2x = 7.625 3x+ 15 = 5x-5
4. Column calculation.
When a number is divided by 100, the quotient is 10, and the remainder is an integer. What is the maximum quantity?
Fifth, solve the problem. (20 points)
1, hongqi workshop produced a batch of parts in three days. A total of 20 parts were produced on the first day, 20 more than on the first day, and 55 were produced on the third day. How many parts are there in this batch?
2. Wang Fang's father deposited 5,000 yuan in the bank for 2 years, with an annual interest rate of 2.25% and interest tax of 20% of the total interest. How much principal and after-tax interest does Fang's father get after maturity?
3. The circumference of the bottom surface of the cylindrical oil drum is 12.56 decimeter, and the height is 10 decimeter. Now it's full of gasoline. If the weight of gasoline per liter is 0.85 kg, how many kilograms of gasoline can this barrel hold?
4, a pile of oranges, filled with 3 baskets plus 18 kg is exactly the weight of this pile of oranges, and the rest is just filled with 8 baskets. How many kilograms is this pile of oranges?
6. Draw an expanded drawing of an iron box without a cover on a large-scale drawing (as shown in the figure). Please measure the relevant data on the drawing to find out how many square decimeters of iron sheets are actually used in this iron box. How many cubic decimeters is its actual volume?
Graduation simulation test paper