Write down the error interval for each of the following questions:Name: Date:

**Question 1:**The density of an alloy,

*m*, correct to 2 significant figures is 5.3g/cm

^{3}. Write down the error interval for

*m*

**Question 2:**The speed of a car,

*e*, rounded to the nearest whole number is 55km/h. Write down the error interval for

*e*

**Question 3:**The weight of a suitcase,

*u*,

**truncated**to 1 decimal place is 6.4kg. Write down the error interval for the weight of the suitcase.

**Question 4:**The volume of a box,

*y*, correct to 1 significant figure is 1,000cm

^{3}. Write down the error interval for

*y*

**Question 5:**A number,

*f*, correct to 3 significant figures is 4.45. Write down the error interval for

*f*

**Question 6:**The number of peas in a pack,

*w*, rounded to the nearest 100 is 400 peas. Write down the error interval for

*w*

**Question 7:**The width of a box,

*b*, rounded to the nearest 10mm is 120mm. Write down the error interval for

*b*

**Question 8:**The number of daily commuters travelling by train,

*k*, correct to 3 significant figures is 37,700. Write down the error interval for

*k*

**Question 9:**The length of a road,

*v*, rounded to 2 decimal places is 0.79km. Write down the error interval for the length of the road.

**Question 10:**A number,

*r*,

**truncated**to 2 decimal places is 17.16. Write down the error interval for

*r*

**Question 11:**A number,

*b*, rounded to the nearest whole number is 613. Write down the error interval for

*b*

**Question 12:**The length of a piece of string,

*t*, rounded to 1 decimal place is 48.2cm. Write down the error interval for the length

*t*

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# Answers

**Question 1:**5.25 ≤

*m*< 5.35

**Question 2:**54.5 ≤

*e*< 55.5

**Question 3:**6.4 ≤

*u*< 6.5

**Question 4:**950 ≤

*y*< 1,050

**Question 5:**4.445 ≤

*f*< 4.455

**Question 6:**350 ≤

*w*< 449

**Question 7:**115 ≤

*w*< 125

**Question 8:**37,650 ≤

*k*< 37,749

**Question 9:**0.785 ≤

*v*< 0.795

**Question 10:**17.16 ≤

*r*< 17.17

**Question 11:**612.5 ≤

*b*< 613.5

**Question 12:**48.15 ≤

*t*< 48.25

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