Question 1
Scoring note — platform: initial 0; Q1–15: 2 points each; Q16–25: 4 points each; wrong/blank: 0; maximum 70.
Official reference rules: initial 15; Section A correct +2, wrong −1, blank 0; Section B correct +4, wrong/blank 0; maximum 85.
Find the value of $2020\times2020-2020\times20+2020$.
Official reference rules: initial 15; Section A correct +2, wrong −1, blank 0; Section B correct +4, wrong/blank 0; maximum 85.
Find the value of $2020\times2020-2020\times20+2020$.