Directions: Replace the letters with their corresponding mathematical operators and evaluate the expression using standard BODMAS rules.

If 'P' represents '+', 'Q' represents '÷', 'R' represents '×', and 'S' represents '-', then calculate the value of the following expression:
18 P 6 Q 3 R 4 S 8

The correct answer is 18.

Step-by-step explanation:

Given expression: 18 P 6 Q 3 R 4 S 8

First, replace each letter with its corresponding mathematical operator as given in the question:
- P represents + (Addition)
- Q represents ÷ (Division)
- R represents × (Multiplication)
- S represents - (Subtraction)

Substituting these operators into the given expression yields:

$18+6÷3\times 4-8$

Now, evaluate the expression using standard BODMAS (Brackets, Orders, Division, Multiplication, Addition, Subtraction) rules:

Step 1: Perform Division (Q)
First, divide 6 by 3:

$6÷3=2$

Substituting 2 back into the expression gives:

$18+2\times 4-8$

Step 2: Perform Multiplication (R)
Next, multiply 2 by 4:

$2\times 4=8$

Substituting 8 back into the expression gives:

$18+8-8$

Step 3: Perform Addition (P)
Add 18 and 8:

$18+8=26$

Substituting 26 back into the expression gives:

$26-8$

Step 4: Perform Subtraction (S)
Finally, subtract 8 from 26:

$26-8=18$

Hence, the value of the expression is 18.