8,9-1,2•(1,3+0,7)

Let's evaluate the expression step by step:

Expression: 8.9 - 1.2 × (1.3 + 0.7)

1. Calculate inside the parentheses: 1.3 + 0.7 = 2.0

2. Multiply: 1.2 × 2.0 = 2.4

3. Subtract: 8.9 - 2.4 = 6.5

Final answer: 6.5