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Discount reward for primary school mathematics concept: 20 points.
The discount problem in math problems is generally to calculate the price of the original item after discount, or to calculate how much discount can be made according to this discount.

The price of this commodity is: (original commodity price) ×0. 1.

0. 1 is a discount, with a 10% discount on the original price.

The 20% discount is: (original item price) ×0.2.

The 30% discount is: (original item price) ×0.3.

The 60% discount is: (original item price) ×0.4.

The 50% discount is: (original item price) ×0.5.

The 60% discount is: (original item price) ×0.6.

The 30% discount is: (original price) ×0.7.

The 20% discount is: (original item price) ×0.8.

10% discount is: (original commodity price) ×0.9.

For example, here is a plush dress, the price is one in 220 yuan. Q: After 15% discount and 10% discount.

What is the price of this plush dress? What is the discount?

Solution: The price of plush clothes after 15% discount is:

220× 0.85 = 187 (yuan)

220- 187 = 33 (yuan)

The price of plush clothes after a 10% discount is:

220× 0.9 = 198 (yuan)

220- 198 = 22 (yuan)

A: After a 15% discount, the price of plush clothes is 187 yuan, and the discount is 33 yuan.

After a 10% discount, the price of plush clothes will be 198 yuan, and 22 yuan after the discount.

From this example, we can see that:

The lower the discount, the more money you get and the cheaper you buy.