propagation addition

Question

When adding two measured quantities (with absolute errors ΔA, ΔB), resultant absolute error is:

RankGuru · Accepted Answer

In addition or subtraction, the **absolute errors** always add up for the maximum possible error.
- If $Z = A + B$ or $Z = A - B$
- The maximum absolute error in $Z$ is $\Delta Z = \Delta A + \Delta B$.
This reflects the worst-case scenario where errors in both measurements contribute in the same direction.

Rank Guru

propagation addition

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