1. The problem asks to write the unit in decimal form for "10 thousandths". 2. "Thousandths" means parts out of 1000, so 1 thousandth is $\frac{1}{1000} = 0.001$. 3. Therefore, 10 thousandths is $10 \times 0.001$. 4. Multiply: $10 \times 0.001 = 0.01$. 5. So, 10 thousandths written as a decimal is $0.01$.