-2080, 1 100, - 1 120, 20 10, 890, -940.
1 hour later, he stopped to have a rest. At this time, where is he? How far is it from a? How many meters did Xiaoming run?
27. Orchards in A and B have 15 tons and 40 tons of apples respectively, all of which are transported to C and D, while C and D need 15 tons and 35 tons of apples respectively; The known freight rates from places A and B to places C and D are as follows:
Freight rate from c to d.
Every ton of an orchard 15 yuan 12 yuan.
B Orchard 10 yuan per ton 9 yuan.
(1) If the number of apples transported from orchard B to place C is x tons, the number of apples transported from orchard B to place D is tons; The transportation cost of apples from orchard A to orchard D is RMB.
(2) Use the formula containing X to express the total transportation cost (requirements: list the formula and simplify it). ..
1. A store has a product backlog 100 pieces. In order to dispose of this batch of goods as soon as possible, the store adopted the following sales plan, raising the price to 2.5 times the original price, and then reducing it by 3 times; Reduce the price by 30% for the first time and mark "loss price"; Reduce the price by 30% for the second time and mark "Bankruptcy Price"; Reduce the price by 30% for the third time, and mark "jumping price". The sales results of the three price reduction treatments are as follows:
Fill in the blanks
The reciprocal of 1, the absolute value is, and the reciprocal is.
2, number, 0.6 18,-3.14,260, -200 1, 0, -0.5, -5%, integer is.
The score is, and the negative number is.
3. Write the calculation results directly:
( 1)-8 + 4÷(-2)= ;
(2)-32×(-5)5= 。
4. If A and B are reciprocal, and C and D are reciprocal, then 3ab+2 c+2d=.
5, an extra-curricular book, read 10 for the first time, read the remaining half the next day, and there are 5 pages left, then the book has pages.
6. A submarine is spying at -50m, and there is a shark cruising directly above 10m, so the height of the shark is meters.
The complementary angle of 7.5904 1/ is, and the complementary angle is; 27.80= minutes.
8. The approximate value of 35.7 is accurate enough to have a valid figure.
9. The point represented by a number on the number axis is 2.8 unit lengths away from the origin and on the left side of the origin, then the reciprocal of this number is.
10, compare the size of each logarithm:-0.5; - 1。
1 1. Please indicate the following survey methods:
(1) Your classmate's height:
(2) Traffic volume of a certain section:
12, as shown in figure (1), the graph rotates once along the dotted line, and the surrounding geometry is.
Number of price reductions one, two, three
The number of pieces sold is 10 40.
(1) What is the original percentage of the fire price?
(2) The goods are sold according to the new sales plan, which plan is more profitable than the original price and which one is completely sold out?
The distance between port A and port B is 60 kilometers. A ship sails downstream from Port A to Port B for a period of time, then turns back to Port A 10km, and then turns around and sails to Port B, which is the same as the time it takes for the ship to sail directly from Port B to Port A. If the current speed is 2 km/h, find the speed of the ship in still water.