Number of Significant Figures in Result of Addition or Subtraction/Examples/83.42 - 72

Example of Use of Number of Significant Figures in Result of Addition or Subtraction

 * $83 \cdotp 42 - 72 = 11$

Proof
We have that:
 * the least significant digit $d_m$ of $83 \cdotp 42$ is the $10^{-2}$ position
 * the least significant digit $d_n$ of $72$ is the $10^0$ position.

So from Number of Significant Figures in Result of Addition or Subtraction:


 * the least significant digit of $83 \cdotp 42 - 72$ is the greater significant digit of $10^{-2}$ and $10^0$, that is $10^0$.