SASMO 2022 Grade 7 Question 1

Grading: platform starts at 0; Q1–15: 2 points each, Q16–25: 4 each; wrong/blank: 0; maximum 70. Official reference starts at 15; Section A +2/−1/0 and Section B +4/0/0 for correct/wrong/blank; maximum 85. Time: 90 minutes (official-reference default).

Find the value of $2022-1876+1979+4876$.