-3,69+6 2/13-1,31+8 11/13

Let's evaluate the expression step by step: Expression: \(-3,69 + 6 \tfrac{2}{13} - 1,31 + 8 \tfrac{11}{13}\) **Step 1: Convert the mixed numbers into improper fractions or decimal equivalents** - \(6 \tfrac{2}{13}\): \[ 6 + \frac{2}{13} = \frac{6 \times 13 + 2}{13} = \frac{78 + 2}{13} = \frac{80}{13} \approx 6.1538 \] - \(8 \tfrac{11}{13}\): \[ 8 + \frac{11}{13} = \frac{8 \times 13 + 11}{13} = \frac{104 + 11}{13} = \frac{115}{13} \approx 8.8462 \] **Step 2: Convert all numbers to decimal form for easier addition** - \(-3,69\) (assuming comma as decimal separator): \(-3.69\) - \(6 \tfrac{2}{13} \approx 6.1538\) - \(-1,31\): \(-1.31\) - \(8 \tfrac{11}{13} \approx 8.8462\) **Step 3: Sum all terms** \[ (-3.69) + 6.1538 + (-1.31) + 8.8462 \] Calculate step by step: - \(-3.69 + 6.1538 = 2.4638\) - \(2.4638 - 1.31 = 1.1538\) - \(1.1538 + 8.8462 = 10.0\) **Final result:** \(\boxed{10}\) **Answer: \(\boxed{10}\)**