Mathematics for IGCSE & O level - Estimation (Section 1 - No. 29)
You measured the length and width of a table as 1.84m and 1.52m. The correct area of the table is?
2.80 m²
2.8048 m²
2.8 m²
2.805 m²
解释
Based on the question the answer has to be 2.8m², because the measurements were rounded to 2 significant figures.