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.