1. A and B drive from Shanghai and Nanjing at the same time. After 3.1 hours, car a meets car B 12.4 kilometers above the midpoint. Car a travels 54 kilometers per hour, and car B how many kilometers per hour? 2. A car needs 0.02 liter gasoline to travel 1 km, so 1 liter gasoline can travel () km The unit of 3.0.16 is (), which has () such units Except for questions 2 and 3 The third problem is wrong, it should be: the counting unit of 0.16 is (), it has () such counting units, and then () such units in the sky, the result is equal to 1

1. A and B drive from Shanghai and Nanjing at the same time. After 3.1 hours, car a meets car B 12.4 kilometers above the midpoint. Car a travels 54 kilometers per hour, and car B how many kilometers per hour? 2. A car needs 0.02 liter gasoline to travel 1 km, so 1 liter gasoline can travel () km The unit of 3.0.16 is (), which has () such units Except for questions 2 and 3 The third problem is wrong, it should be: the counting unit of 0.16 is (), it has () such counting units, and then () such units in the sky, the result is equal to 1

After 3.1 hours, car a meets car B at the point 12.4 kilometers above the midpoint. Car a travels 54 kilometers per hour, and car B how many kilometers per hour? When meeting, car a travels more than car B: 12.4 * 2 = 24.8 kilometers. Then car a travels more than car B in one hour: 24.8 / 3.1 = 8 thousand

Ask a few questions, fourth grade math, it's very simple for you ~ ~ ~ urgent!
1, in order to welcome the children's day, the doll clothing factory plans to complete 2000 sets of children's clothing on the 25 day, and 20 people will make the clothes in 20 days. How many sets of clothes do people actually need to make each day?
2. When doing the subtraction problem, one student mistook 6 in the 10 digits of the subtracted number as 8, and 2 in the 10 digits of the subtracted number as 5. The result is 243. What's the correct answer to this problem?
3. A basket of fresh fish with a frame weighs 56 kg. Half of the salted fish is sold first, and then half of the remaining salted fish is sold. At this time, the frame still weighs 17 kg. How many kg does the fresh fish weigh?
There should be formulas, not equations
I only know that the first question equal to 5 is wrong, should equal to 1, but I don't know the formula~~

1.20 people, 20 days, make 2000 sets, so each person does 2000 / 20 / 20 = 5 sets every day. If the answer is 1, it should be the problem you asked. It should be how much more each person does every day. Originally, each person does 2000 / 25 / 20 = 4 sets every day, but now they do 5 sets every day, so each person has to do one more set every day~
2.322-62=260
3.52kg
Is there anyone else who won't_ ∩)O~

An alarm clock, a day and night error does not exceed 12 seconds, the meaning of this sentence?

Day and night
That's 24 hours
It means the error of the meter within 24 hours
Within 12 seconds
Maybe soon
Maybe it's slow