12 - 15 ÷ 3 + 9
Following BODMAS = Bracket Order Division Multiplication Addition Subtraction
Division comes before Addition and Subtraction, so we carry out Division first.
12 - 15 ÷ 3 + 9, 15 ÷ 3 = 5
12 - 5 + 9
7 + 9
16
I hope you find this explanation useful.
