19 problem takes 5 minutes to solve and 3 minutes to finish. After 2 minutes, bring in the number you are required to bring, and then calculate one side (if it is algebraic operation).

If these 20 questions are listed in a chart, what probability should be controlled in 3-5 minutes?

The 2 1 question should be a proof question. Usually make an auxiliary line or something. 5-8 minutes.

22 function image problem is generally solved by undetermined coefficient method, 8- 10.

Question 23 is purely what he said, so do it. Generally the last question may be a bit difficult. Skip first, and the first few questions will be done in 3-5 minutes.

Question 24 is also a proof question. Generally, the first and third questions are given for nothing. Answer this first, pass the second question first, and answer if you can. You won't go over and do problem 25 right away.

Question 25 is a function question, which is generally a binary linear function. Finding vertex coordinates is quite simple, isn't it? 8- 10 should be enough.

The first question of 26 questions must be given for nothing, 1 minute.

The rest of the time, I will ponder 23 or 24 questions. If I can't figure it out in the last 30 minutes, I'll do 26 questions. I usually do it with similarity. In the last 15 minutes, I will check and fill in the blanks and mark them.