Basic Rules for Measurment Errors

operation uncertainty (error) analysis
sum (A ± ΔA) + (B ± ΔB) = (A + B) ± (ΔA + ΔB)
difference (A ± ΔA) - (B ± ΔB) = (A - B) ± (ΔA + ΔB)
product (A ± ΔA) * (B ± ΔB) = (A * B) ± (ΔA/A + ΔB/B)*100%
quotient (A ± ΔA) / (B ± ΔB) = (A / B) ± (ΔA/A + ΔB/B)*100%
nth power (A ± ΔA)n = An ± n(ΔA/A)*100%
nth root (A ± ΔA)1/n = A1/n ± 1/n(ΔA/A)*100%