What will come in the place of question (?) mark in following the question:

$4.5\times 8+31.6+?=400$

The correct answer is 332.4.

To find the value that replaces the question mark (?), we can simplify the equation step-by-step using the basic order of operations.

The given equation is:

$4.5\times 8+31.6+?=400$

Step 1: Perform the multiplication.
First, multiply $4.5$ by $8$:
$4.5\times 8=36$

Now, substitute this value back into the equation:
$36+31.6+?=400$

Step 2: Perform the addition.
Next, add $36$ and $31.6$:
$36+31.6=67.6$

Substitute this sum back into the equation:
$67.6+?=400$

Step 3: Solve for the unknown value (?).
Subtract $67.6$ from both sides of the equation to find the value of the question mark:
$?=400-67.6$
$?=332.4$

Therefore, the value that should come in place of the question mark is 332.4.