Xiao Li and Xiao Zhang practice running on a 600 meter long circular track. If they start from point a at the same time and walk in opposite directions, it will take 1.2 minutes to meet each other. If they walk in the same direction, Xiao Li will take 3 minutes to catch up with Xiao Zhang 1. What's their speed in meters per minute? 2. How many minutes does it take Xiao Li to make a circle around the circular runway? How many minutes does it take Xiao Zhang to make a circle around the circular runway? (keep one decimal place)

Xiao Li and Xiao Zhang practice running on a 600 meter long circular track. If they start from point a at the same time and walk in opposite directions, it will take 1.2 minutes to meet each other. If they walk in the same direction, Xiao Li will take 3 minutes to catch up with Xiao Zhang 1. What's their speed in meters per minute? 2. How many minutes does it take Xiao Li to make a circle around the circular runway? How many minutes does it take Xiao Zhang to make a circle around the circular runway? (keep one decimal place)

(1) 600 △ 1.2 = 500m / min
600 △ 3 = 200m / min,
Xiao Li's speed is (500 + 200) △ 2 = 700 △ 2 = 350 m / min,
Xiao Zhang's speed is (500-200) △ 2 = 300 △ 2 = 150 m / min,
(2) Xiao Li: 600 ／ 350 ≈ 1.7 minutes,
Xiao Zhang: 600 △ 150 = 4 minutes
Please accept as "satisfactory answer"

Primary school fifth grade mathematics problem, please use the equation to solve, thank you!
The sum of a and B is 19.22. Xiaobing accidentally moved the decimal point of B to the left when he was in the computer. In this way, the sum is 5.18. What are the two numbers?

Let a x B y
So x + y = 19.22
x+y/10=5.18
The solution is x = 3.62
y=15.6

The solution of mathematics problem equation in grade five of primary school
1. Give a packet of sweets to the children. If each of them has ten sweets, it's just finished; if each of them has 16 sweets, but three of them can't, how many sweets are there in this packet?
2. There are 100 skilled workers in Xinxin woodworking factory. Each worker can process 10 desks or 15 benches on average every day. Only one desk and one bench can be delivered. How to arrange the number of benches for processing desks so as not to cause waste and meet the delivery requirements?
Thank you
We need to solve the equation of first degree with one variable

1. There are x persons in total
10X=（X-3）*16
10X-10X+48=16X-48+48-10X
6X=48
X=8
8 * 10 = 80
A: there are 80 candies in this bag
2. There are x benches and (100-x) desks
10x=15*(100-x)
10x=1500-15x
10x+15x=1500-15x+15x
x=60
100-60 = 40 (person)
A: there are 60 benches and 40 desks