Fill in the blanks. (30 points)?

1. If both the minuend and the minuend increase by 25, then the difference is ().

2. The number of172 more than 2 17 is ().

3. Expand 0.2 16 by 100 times, and then reduce it by 1000 times. The number is ().

4.4 Percentile is smaller than percentile ().

There is a two-digit number. Add a decimal point before one of its digits and then add it to the two-digit number to get 29.7. This two-digit number is ().

6. A nine-digit number, where one digit is 7, the tenth digit is 2, and the sum of any three adjacent digits is 15. This nine-digit number is ().

7. For two decimal places, the result is 2.43 smaller than the original number after the decimal point is moved to the right by one place. The original two decimal places were ().

8. The distance between cities A and B is 780 kilometers. The bus started from city A and drove for 6 hours, 30 kilometers away from the midpoint. This car travels () kilometers per hour.

9. A pair of rectangular paper pairs is folded into three equal parts and becomes a square. The circumference of a square is 40 cm, so the circumference of the original rectangle is () cm.

The sum of 10 and the numbers a and b is 2 18. If we add up the number C, the average of the three numbers is 5 more than the average of the numbers A and B, and the number C is ().

Second, use a simple method to calculate. (20 points)

395-283+ 154+246- 1 17 8795-4998+2994-3002-2008

1999+999×999 38×25×6

Third, the application problem. (50 points)

1. There are 78 kinds of chrysanthemums, roses and tulips in the flower shop, of which 4 kinds of chrysanthemums are twice as many as roses and 2 kinds of roses are three times less than tulips. How many flowers are there in each of these three kinds of flowers?

2. There are 530 geese in Zhenhua Farm, the number of ducks is three times that of geese, and the number of chickens is 80 more than the total number of geese and ducks. How many chickens are there?

The speed of express train is 50 kilometers per hour, and the speed of local train is 40 kilometers per hour. The local train will leave for 2 hours, the express train will leave from other places, and the two cars will meet in 3 hours. How many kilometers are the two places apart?

4. The food box factory used to produce 600 food boxes every day. Now, due to the improvement of production equipment, it can produce 120 more food boxes every day, so that it can produce 18000 more food boxes, and the task can be completed a few days earlier than before.

5. To transport 58 tons of goods from City A to City B, the freight rate is 150 yuan if it is transported by a large truck with a load of 5 tons; Shipment by medium-sized truck with a load of 2 tons, freight 80 yuan; Shipment by van, load 1 ton, freight 50 yuan. How many trucks, medium trucks and small trucks do you need to ship the goods at once with the least money? (only fill in numbers, not formulas)

Large trucks (), medium trucks () and small trucks ().