allexzzzandrea allexzzzandrea 16-05-2017 Mathematics contestada Which operation should be performed first according to the order of operations? 21 – 5 + 24 ÷ 3 + 90 • 4 A. 21 – 5 B. 5 + 24 C. 24 ÷ 3 D. 90 • 4