55:6-5*908*1123:2

Let's evaluate the expression step by step:

Expression: \( 55:6 - 5 \times 908 \times 1123 : 2 \)

Note: Typically, in some notation, ":" represents division. Assuming ":" means division, the expression becomes:

\[ \frac{55}{6} - 5 \times 908 \times 1123 \div 2 \]

Now, perform calculations following the order of operations (PEMDAS):

1. Division and multiplication from left to right:

• \( \frac{55}{6} \) remains as is.
• Compute \( 5 \times 908 \times 1123 \).

2. Calculate \( 5 \times 908 = 4540 \).

3. Next, \( 4540 \times 1123 \):

Let's do that:

• \( 4540 \times 1123 \):

Break down:

\( 4540 \times 1123 = 4540 \times (1000 + 100 + 20 + 3) \)

• \( 4540 \times 1000 = 4,540,000 \)
• \( 4540 \times 100 = 454,000 \)
• \( 4540 \times 20 = 90,800 \)
• \( 4540 \times 3 = 13,620 \)

Now, sum these:

\( 4,540,000 + 454,000 + 90,800 + 13,620 = 5,098,420 \)

4. Now, divide this result by 2:

\( 5,098,420 \div 2 = 2,549,210 \)

5. Finally, subtract this from \( \frac{55}{6} \):

\( \frac{55}{6} - 2,549,210 \)

Express \( \frac{55}{6} \approx 9.1667 \)

So, the final result:

\[ 9.1667 - 2,549,210 \approx -2,549,200.8333 \]

Answer:

\(\boxed{-2,549,200.83}\) approximately.