Mathematics for IGCSE & O level - Estimation (Section 1 - No. 50)
If a measurement is given as 12.345 meters and you need to express it to 3 significant figures, what would the result be?
12.3
12.35
12.34
12
Maelezo
12.345 rounded to 3 significant figures becomes 12.3 because the fourth digit is less than 5.