Mathematics for IGCSE & O level - Limits Of Accuracy (Section 3 - No. 18)

Find the upper bound of the difference between 24.1 s and 19.8 s, both to the nearest 0.1 s.

4.2 s

4.3 s

4.4 s

4.5 s

Upper bound of the difference. 24.15 - 19.75 = 4.4. therefore it's 4.3 (to one decimal place)