2、
A class will buy some ping-pong balls and ping-pong bats. The situation is as follows: Shop A and Shop B sell two kinds of table tennis and table tennis bats of the same brand. Each pair of ping-pong bats costs 30 yuan, and each box of ping-pong balls costs 5 yuan. After negotiation, a store gives a box of table tennis for every racket it buys, and B store gives a 10% discount on the pricing. This class needs 5 sets of rackets and several boxes of table tennis (not less than 5 boxes). If this class needs to buy X boxes of table tennis, please ask:
(1) How much do Store A and Store B need respectively?
(2) When x= 15, which is cheaper?
(3) When x=30, which is cheaper?
Are the two preferential payment methods the same? (2) When buying 15 boxes and 30 boxes of table tennis, please do the following. Which store are you going to buy? Why? The two preferential payment methods are the same.
3、
The original price of a commodity is 20 yuan, and four stores A, B, C and D promote it in different ways: A store: "buy one get one free" B store: 20% lower sales; C shop: 30% off for sale; Ding Dian: You can get a 60% discount if you buy enough 100 yuan.
(1) If you only buy one, which store is cheaper and what is the unit price?
(2) If you buy too much, which store is the best to go to and what is the unit price? At this time, how many should you buy at least?
4. The market price of a beverage is as shown in the figure: In order to increase sales, various stores have launched promotional activities. Shop a buys one big and gets one free; Store B reduced the price by10%; Store C has a 20% discount when it is full of 30 yuan. Grandma Wang wants to buy four big drinks and five small drinks. According to the preferential conditions of the above three stores, please ask Grandma Wang to help me figure out which store to buy is the most economical.
For shirts with a price of 5.80 yuan, shop A can get a 20% discount, and shop B can buy four shirts and get one free. A company wants to buy 10 shirts, which store is more cost-effective? How much cheaper can it be?
6、
A case of beer 12 bottles, each bottle has the same unit price. During the festival, two stores, A and B, sell the same beer and adopt different promotion methods:
A: Buy a box and get a 20% discount.
Store B: Buy 3 bottles and get 1 bottle.
If you buy a case of beer, which store is cheaper? Please write down the reasons briefly.
7. The school buys HP brand laser printers. Buy 5 sets in the store and pay 4050 yuan; I bought the same printer 12 online for 6000 yuan. How much cheaper is it to buy a printer online than in a store?
8、
A stationery, the original price of 20 yuan, A, B, C, D four stores, different sellers to promote.
A: 10% discount. B: 10% discount. C: "buy 10 to send 1". D: If you buy 100 yuan, you can get a 20% discount.
(1) Kittens only buy 1, to
Shops are cheaper, and the unit price is
Yuan.
(2) Xiaoli buys 6, and the goods arrive.
Shops are the cheapest.
9、
A class wants to buy some table tennis and table tennis bats. Now we know the following: Shop A and Shop B sell the same brand of table tennis and table tennis bats, each pair of table tennis bats is 30 yuan, and each box of table tennis 5 yuan. After negotiation, Shop A gives each racket a box of table tennis, and Shop B gives a 10% discount.
(1) If this class needs to buy 5 sets of rackets and 10 boxes of table tennis, please purchase them. Which store is more economical to buy? Why?
(2) This class needs to buy 5 sets of rackets and several boxes of table tennis (not less than 5 boxes). How many boxes of table tennis do the two preferential ways pay the same amount?
10、
A middle school needs to buy some teaching instruments. Option 1: Buy in the store, each needs 8 yuan; Option 2: The school makes it by itself, and each piece needs 4 yuan, but the rental fee for making tools is 120 yuan, and X pieces of instruments are needed. The cost of scheme 1 is y 1 yuan, and the cost of scheme 2 is y2 yuan.
(1) get the functional relationship of y 1 and y2 about x respectively;
(2) When purchasing multiple instruments, the cost of the two schemes is the same;
(3) If the school needs 50 instruments, which scheme is cheaper?
Landlord, 10 is the limit, give some points,
Hope to adopt, thank you.