• A car, traveling at constant speed, covers 240 ± 2 m in 12 ± 0.2 s. What is its speed?
20.01 ± 0.50 m/s, or 20 ± 0.5 m/s.
• Other examples: x*y, x∈[3.8,3.9], y∈[6.4,6.5]; x^y, x=0.9±0.05, y∈[1.39,1.40]; x/y, x=50±0.5, y=2.
24.84 ± 0.52 or 24.8 ± 0.5; 0.864 ± 0.068 or 0.86 ± 0.07; 25.00 ± 0.25