0,000000000000005:2

The expression you provided is "0,000000000000005:2". Assuming the colon ":" signifies division, this can be interpreted as: \[ \frac{0,000000000000005}{2} \] Note that in many European countries, the comma is used as the decimal separator. Converting to a standard decimal notation: \[ 0.000000000000005 \div 2 \] Calculating this: \[ 0.000000000000005 \div 2 = 0.0000000000000025 \] **Final answer:** \[ \boxed{0.0000000000000025} \]