Calculate the upper and lower bounds for each of the following questions:Name: Date:

**Question 1:**3.0mm rounded to 2 significant figures.

**Question 2:**80.3cm rounded to 1 decimal place.

**Question 3:**9,200,000g rounded to 3 significant figures.

**Question 4:**4.2g correct to 2 significant figures.

**Question 5:**800cm

^{3}correct to 1 significant figure.

**Question 6:**89.2cl correct to 3 significant figures.

**Question 7:**67km/h rounded to the nearest whole number.

**Question 8:**120mm rounded to the nearest 10mm.

**Question 9:**19.11km rounded to 2 decimal places.

**Question 10:**200g rounded to the nearest 100g.

**Question 11:**195m rounded to the nearest 5m

**Question 12:**120cl rounded to the nearest 5cl

**Question 13:**170,000cm rounded to 3 significant figures.

**Question 14:**6.50kg rounded to 2 decimal places.

**Question 15:**826ml rounded to the nearest whole number.

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# Answers

**Question 1:**lower bound = 2.95mm, upper bound = 3.05mm

**Question 2:**lower bound = 80.25cm, upper bound = 80.35cm

**Question 3:**lower bound = 9,195,000g, upper bound = 9,205,000g

**Question 4:**lower bound = 4.15g, upper bound = 4.25g

**Question 5:**lower bound = 750cm

^{3}, upper bound = 850cm

^{3}

**Question 6:**lower bound = 89.15cl, upper bound = 89.25cl

**Question 7:**lower bound = 66.5km/h, upper bound = 67.5km/h

**Question 8:**lower bound = 115mm, upper bound = 125mm

**Question 9:**lower bound = 19.105km, upper bound = 19.115km

**Question 10:**lower bound = 150g, upper bound = 250g

**Question 11:**lower bound = 192.5m, upper bound = 197.5m

**Question 12:**lower bound = 117.5cl, upper bound = 122.5cl

**Question 13:**lower bound = 169,500cm, upper bound = 170,500cm

**Question 14:**lower bound = 6.495kg, upper bound = 6.505kg

**Question 15:**lower bound = 825.5ml, upper bound = 826.5ml

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