SASMO 2019 Grade 9 Question 1

Platform scoring: initial 0; Q1–15: 2 points each, Q16–25: 4 points each; wrong/blank: 0; maximum 70. Official source rules: initial 15; Section A correct +2, wrong −1, blank 0; Section B correct +4, wrong/blank 0; maximum 85.

Evaluate $-\frac14\times2019.625-0.625+0.75\times2019.625+\frac12\times2019.625$.