Judge whether the two quantities in the following questions are in inverse proportion, and explain the reasons 1. A certain distance, speed and time 2. The length of a rope is fixed, the minus part and the rest 3. The total number of processing parts is fixed, the number of processing and processing days per day 4. The divisor is definite, the divisor and quotient 5. Lingling's walking speed and time from home to school

Judge whether the two quantities in the following questions are in inverse proportion, and explain the reasons 1. A certain distance, speed and time 2. The length of a rope is fixed, the minus part and the rest 3. The total number of processing parts is fixed, the number of processing and processing days per day 4. The divisor is definite, the divisor and quotient 5. Lingling's walking speed and time from home to school

The inverse proportion of two numbers means that the product of multiplication of two numbers remains unchanged!
The first is the inverse proportion: distance = speed × time, so if the speed is fast, the time will be short;
The second is not, the total length = cut + the rest, although it is cut more, the rest is less, but the inverse proportion is a product relationship, so it is not;
The third is yes, total number = number of days, the same as the first;
The fourth is, divisor = divisor × quotient;
The fifth is, distance = speed × time

Let's give some math problems for the next semester of the sixth grade, and make a test
fast

When car a runs 65% of the whole journey and car B runs 70 meters, the two cars meet. How many kilometers is the distance between the two places
Xiaoyue's family grows 6 hectares of corn, and the sorghum is 1 / 2 hectare less than 2 / 3 of corn. How many hectares of sorghum does Xiaoyue's family grow?
Only the formula, not the calculation
For a job, it takes 4 hours for Party A to do it alone and 5 hours for Party B to do it alone
(1) What percentage of the total work can be completed by Party A and Party B in one hour
(2) How many parts of the whole work can be completed if Party A and Party B cooperate for two hours?
Formula:
(3) How much more work does party a complete than Party B per hour
(4) How many hours can party A and Party B cooperate to complete all the work
(5) Party A and Party B cooperate 1 / 4 first, then the rest will be completed by Party B, how many hours will it take?
1. Set the whole distance to x meters
x - 65%x = 70
35%x = 70
x = 200
A: the distance between the two places is 200 meters
2. (6 × 2 / 3) × 1 / 2 = 2 (HA)
A``````````
3.（1）1/4 + 1/5
（2）2/4 + 2/5
（3）1/4 - 1/5
（4）1÷（1/4 + 1/5）
（5）（1 - 1/4）÷1/5