Fractional multiplication and division 1. How many air conditioners are sold in the first day, one-third of them in the second day, 14 in the third day? 2. A pile of goods is transported 4 / 15 of the first time, and the second time is 2 tons more than the first time. How many tons are there? What is the probability and usage of unit "1"? Find out how to use unit 1? How to find it?

Fractional multiplication and division 1. How many air conditioners are sold in the first day, one-third of them in the second day, 14 in the third day? 2. A pile of goods is transported 4 / 15 of the first time, and the second time is 2 tons more than the first time. How many tons are there? What is the probability and usage of unit "1"? Find out how to use unit 1? How to find it?

1. On the first day and the third day, a total of 8 / 15 of these air conditioners were sold. Then on the second day, 7 / 15 of these air conditioners were sold, so 14 / (7 / 15) = 30
2. If 11 / 15 of the goods are transported in the second time, then 7 / 15 of the more goods are transported in the second time, then 2 / (7 / 15) = 30 / 7 tons
3. The probability is 100%