1. The fruit store brought in 180 kg of fruit, sold 2 / 5 of the fruit on the first day, and sold the remaining 3 / 4 the next day. How many kg of fruit are left? 2. The school canteen bought a barrel of oil, which weighs 24 kg. The first time it used 1 / 4 of the total oil, the second time it used the remaining 1 / 3, and the third time it used 1 / 2 of the oil in the barrel. How many kg of oil is left in the barrel?

1. The fruit store brought in 180 kg of fruit, sold 2 / 5 of the fruit on the first day, and sold the remaining 3 / 4 the next day. How many kg of fruit are left? 2. The school canteen bought a barrel of oil, which weighs 24 kg. The first time it used 1 / 4 of the total oil, the second time it used the remaining 1 / 3, and the third time it used 1 / 2 of the oil in the barrel. How many kg of oil is left in the barrel?

1、180*（1-2/5）=108
108*(1-3/4)=27
2、24*（1-1/4）=18
18*(1-1/3)=12
12*(1-1/2)=6

Score reduction application questions (simple)
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In fact, it's very simple, but, because the notes are missing, so, do me a favor
1. A box of fruit candy weighs 500g. After eating two fifths of it, the remaining box weighs 340g. How many grams of this box of fruit candy? How many grams of this box?
2. Road construction: on the first day, 1 / 3 of the total length of the road is more than 2 kilometers, on the second day, the remaining 1 / 2 is less than 2 kilometers, on the third day, the remaining 1 / 4 of the road is more than 4 kilometers, and at this time, there are still 23 kilometers left. How many kilometers is the length of this section of road?
A remark must be made to indicate the question number
3. The canteen delivered a batch of rice. In the first week, they ate 2 / 5 of all the rice. In the second week, they ate the remaining 3 / 5, and there were 405 grams left to eat. How many kilograms of rice did the canteen deliver?
Problem solving ideas, formulas, formulas,
As long as these have, will award points Oh!

1,[500-340]/[2/5]=400
500-400=100
Fruit candy 400 grams, box 100 grams
2,[23+4+2-2]/[1-1/3-1/2【1-1/3】-1/4【1-1/3-1/2[1-1/3]】]=108
3. What's wrong with the title?