To express a compound mass as a decimal in kilograms, convert the gram part to kilograms by dividing by 1000, then add.<br><br>
&bull; 206 g = 206 ÷ 1000 = 0.206 kg<br>
&bull; 1 kg + 0.206 kg = 1.206 kg<br><br>
Final Answer: 1.206 kg