Math problem in primary school: A shopping mall will give you a discount of 100, which is actually a 50% discount, because if you buy 100 yuan, you will get a cash coupon of 100 yuan, but this coupon cannot be used to deduct the newly paid 100 Yuan You (of course, there will be no such good thing). So, this is equivalent to spending 100 yuan on it. If converted into a discount rate, it is 50% off. (P.S. The above theory is based on the ideal situation that your original purchase is 100 yuan and your cash coupon is just used to buy 100 yuan. )

Elementary school mathematics, the things in brackets can be ignored, and the answer is 50% off.

The above is the analysis and calculation process, yes, but the final step of the discount rate should be written as 50%!

Glad to answer for you! Hope to adopt!

A shopping mall engaged in promotional activities, bought 100 and gave 20 yuan a gift certificate ... Aunt Wang bought 300 yuan's elementary school math problem and got a gift certificate of 20*3=60 yuan.

The original price of the leather bag is 40+60= 100 yuan.

The original price of leather bag is 300+ 100=400.

Aunt Wang has been paying 300+40=340 yuan.

340/400=0.85

I enjoyed a 15% discount.

Math question: The store offers 200 yuan for 200 yuan promotion, and asks how much discount the store has. According to the explanation of the present shopping mall, the best choice is to buy a commodity in 200 yuan, but there is no such thing. Generally speaking, there is a big difference. The largest is 399 yuan, or only full of 200 yuan, that is to say, all the goods from 200 to 399 yuan are given to 200 yuan.

200/(200+200)=5/ 10

399/(399+200)=6.66/ 10

Actually, it's 5 ~ 6.66 discount (the book and the teacher may think it's 50% discount, so you have to ask the teacher)

Off-topic: the topics in textbooks now often seem to be combined with reality, but in fact they are seriously divorced from reality. On this issue, it is actually endless. When you pay 399 yuan for the first product, the merchant gives you a 200 yuan voucher. On the surface, you got a discount of 6.66. In fact, there is no unit price for 200 yuan's products. The biggest loss is to buy another 399. Then, 200 vouchers, 199 yuan cash. It's over.

(399+199)/399 * 2 = 7.5/10 In other words, a 50% discount is just an illusion given to customers by the merchants, and the actual discount is between 5 and 7.5.

Math problem: A shopping mall is engaged in the promotion of "sending 100 yuan gift certificate to 200 yuan". What's the current price? A shopping mall is engaged in the promotion of "200 yuan 100 yuan gift certificate". The current price is two thirds of the original price.

Math shop offers 4 get free milk promotion 1, which is a discount. We are anxious for a 20% discount. Suppose you buy five 2 yuan flowers 10 yuan, and now you buy four and get one from 8 yuan, which is equivalent to buying five from 8 yuan.

My sister, who has math problems in primary school, saw a promotional advertisement in a shopping mall. 100, 200 yuan, 50% off? This is a cover-up for the mall.

It happened to be in 200 yuan, so I returned it 100, and got a 50% discount.

Most customers don't happen to be in 200 yuan.

I spent 20 yuan to buy a card to promote math problems, and finally saved it 12 yuan.

That means buying books saves 20+ 12=32 yuan.

32/(1-80%) = 32/0.2 =160 (yuan) book capital (no discount)

Total price:160-12 =148 (yuan)

1650 = 600+600+300+150, 300+300+ 150 = 750. She should be a coupon from 750 yuan.

Math problem promotion A: 268+52=320 (yuan) 320-20*2=280 (yuan) B: 320*90%=288 (yuan) 280 is less than 288 A.

Shopping malls engage in sales promotion, and it is stipulated to buy four and get one free. What discount is this? If this is a math problem, the answer is 20% off, but this is not necessarily the case in reality. Maybe there are other tricks.