-1212\frac{1}{2}21+12\frac{1}{2}21= A-11$\frac{1}{2}$B-12C-11D11$\frac{1}{2}$Answer: B. -12 Read Explanation: -1212\frac{1}{2}21+12\frac{1}{2}21 =−252\frac{-25}{2}2−25 + 12\frac{1}{2}21 = −242\frac{-24}{2}2−24 =-12 Read more in App