A 6th grade arithmetic problem and a 6th grade arithmetic problem

Make the fastest person speed x

There are 35 (1-5 7) x = 6

x = km min = 36 km h.

The slowest person has a speed of 36 * 5 7 = 180 7 km/h.

If the fastest person is x kilometers in minutes, then the slowest person is 5 x 7 and the fastest person runs one lap plus the distance traveled by the slowest person.

x*35＝6＋35*5x/7

Solve x kilometers in minutes.

That is, the fastest person can travel at a speed of kilometers and minutes.

The speed of the slowest person is kilometers per minute.

Solution: If the fastest person is x kilometers per hour, then the slowest is 5 7x35 60*x=60+5 7x*35 601 6*x=60

x=3605/7x=1800/7

Idea: When the fastest person catches up with the slowest person and the slowest person, the two can only be separated by one lap.

Solution: Let the speed of the fastest person be x kilometers per minute, then the speed of the slowest person is (5 7) * x per minute

35x-[(5 7)*x]*35=6, solution x=kilometers per minute) so the speed of the person with the block is kilometers per minute, and the speed of the slowest person is 3 7 kilometers per minute.

Because it took 35 minutes for the fastest person to meet the slowest person, it took 35 minutes for the slowest person to meet the fastest person, therefore, the two people have the same amount of time.

The fastest person is 7:5 than the slowest person, so the total distance of the two is 6*2=12 kilometers, so the sum of the speed of the two is 5+7=12, so the time of the two is 12 12=1, 1*5=5 kilometers, 1*7=7 kilometers.

The speed of the fast person is 36 kilometers per hour; Slow man 180 7 km h.

Solution: Original formula = 2*3 2*1 7-5 6

18 Do a good job of lead 42-35 42

Uh-ha . Pure good. Socks open.

There are not many topics to do, as long as you master the methods and draw inferences from one another.

1. 3/7 × 49/9 - 4/3

29. 8/7 × 21/16 + 1/230. 101 × 1/5 – 1/5 × 211.Oral arithmetic for the following questions.

1)58+42= (2)87－45= (3)125×8=(4)50×12= (5)804÷4= (6)134＋66=(7)1000－98= (8)720÷5= (9)0÷47=2.Fill in the order of operations for the following questions, and then calculate the number.

3.Judgment: "Hit the right" and "Hit the wrong".

1) 13 15 has the same meaning as 15 13. (2) The calculation result of 3000 425 8 must be less than the calculation result of 3000 (425 8). (

3) The product of the two factors is 800, if one factor does not change and the other factor shrinks by 20 times, then the product is 40. (

4) Equation: "750 25+35 2" means that the meaning is the quotient of 750 divided by 25; Plus 35 times 2 times, and how much? (

5)24×25=6×4×25=6+100=106( )4.Calculate in an easy way:

5.Calculate the following questions:

What about the topic? How can I help you without giving questions?

Equation x+1 3x=4 12 2x-22=64 11/11 + 8-11/8 5 5 5/6 [4/5 (1-1/3)].

Others: 9, 10, 3, 8, 1, 5, (4, 5+1, 4), 7, 3, +7, 10

Equation Answer: 1 4 43

Short 11 25/36

Other 12 23 20