$4: 2(3+1)=?$
The result of the mathematical expression \(4: 2(3+1)\) is \(\boxed{0.5}\).
Step 1 :The question is asking for the result of the mathematical expression \(4: 2(3+1)\).
Step 2 :The first step is to solve the operation inside the parentheses, which is \(3+1\).
Step 3 :Then, we multiply the result by 2.
Step 4 :Finally, we divide 4 by the result of the multiplication.
Step 5 :The result of the mathematical expression \(4: 2(3+1)\) is \(\boxed{0.5}\).