Literacy Research Memory Skill Practice Stretch! Think of a real-life example of where you would round to one significant figure. This could be a use for significant figures in another subject in school! Estimate, Approximate, Significant, Decimal, Accuracy Explain what bounds are. Skill Practice Stretch! A field is 200m long to the nearest 100m, and 170m wide to the nearest 10m. Write down the maximum and minimum possible perimeters. Number Level of accuracy Rounded answer 19.372 2 d.p. 1 s.f 0.007519 5 d.p. 2 s.f. 46320 2 s.f 153.2617 3 d.p. 4.9043 23.405 3 s.f.