6,4:(-0,32)-1,8·10

To solve the expression \(6.4 : (-0.32) - 1.8 \cdot 10\), we will follow the order of operations (also known as PEMDAS/BODMAS).

1. Calculate \(6.4 : (-0.32)\) \[ 6.4 \div -0.32 = -20 \]

2. Calculate \(1.8 \cdot 10\) \[ 1.8 \cdot 10 = 18 \]

3. Now, combine the results from steps 1 and 2: \[ -20 - 18 = -38 \]

Thus, the final result is: \[ \boxed{-38} \]