r + r ÷ 2 × 4 when r = 8.
8 + 8 ÷ 2 × 4
8 + ___ × 4
8 + ___
___
Lets solve for the missing.
8 + 8 ÷ 2 × 4
8 ÷ 2 = 4
8 + 4 × 4
4 × 4 = 16
8 + 16
8+16 = 24
SO:-
8 + 8 ÷ 2 × 4
8 + _4_ × 4
8 + _16__
_24__
So, r + r ÷ 2 × 4 when r = 8 is 24.
Hope I helped ya!! xD