1. On New Year's day, in order to promote sales, a home appliance store implemented a 20% discount plan. Uncle Wang bought a washing machine. After 20% discount, it was 220 yuan cheaper than the original price How much did Uncle Wang spend on the washing machine? 2. A 200m circular track is composed of two straight tracks and two semicircle tracks, up to 50m in length and 1.25m in width. If a 200mi race is conducted on this track, how many meters is the difference between the starting line of the fourth track and the first track? 3. The total length of a cuboid is 220cm, the ratio of length to width is 2:1, and the ratio of width to height is 3:2 The third question is not necessary,

1. On New Year's day, in order to promote sales, a home appliance store implemented a 20% discount plan. Uncle Wang bought a washing machine. After 20% discount, it was 220 yuan cheaper than the original price How much did Uncle Wang spend on the washing machine? 2. A 200m circular track is composed of two straight tracks and two semicircle tracks, up to 50m in length and 1.25m in width. If a 200mi race is conducted on this track, how many meters is the difference between the starting line of the fourth track and the first track? 3. The total length of a cuboid is 220cm, the ratio of length to width is 2:1, and the ratio of width to height is 3:2 The third question is not necessary,

220 / (1-0.8) = 1100 yuan. A: Uncle Wang spent 1100 yuan on this washing machine. The semicircle diameter of the first runway is (200-50 * 2m) / 3.14 = 31.85 meters. The semicircle diameter of the fourth runway is 31.85 + 1.25 * 3 = 35.6 meters. The length of the runway is 35.6 * 3.14 + 50 * 2 = 211.78 meters, 211.78-200 = 11.78 meters. A: the fourth run

In the promotion activities, if a commodity with a price of 200 yuan is sold at 20% discount on the basis of 20% discount, the price of the commodity is______ Yuan

200 × 810 × 810 = 128 yuan

In a shopping promotion, all goods are 25% off. The price of a sweater is 60 yuan cheaper than before. What was the original price of this sweater?
To write the process, it's better not to make equations!

60 / (1-0.75) = 60 / 0.25 = 240 yuan