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

**Question 1:**The area of a plot of land,

*v*, correct to 1 significant figure is 50,000m

^{2}. Write down the error interval for

*v*

**Question 2:**A number,

*k*, rounded to 2 decimal places is 0.73. Write down the error interval for

*k*

**Question 3:**The number of peas in a pack,

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

*m*

**Question 4:**A number,

*r*,

**truncated**to 1 decimal place is 80.1. Write down the error interval for

*r*

**Question 5:**The density of an alloy,

*n*, correct to 2 significant figures is 4.8g/cm

^{3}. Write down the error interval for

*n*

**Question 6:**A number,

*t*, rounded to 1 decimal place is 66.5. Write down the error interval for

*t*

**Question 7:**A number,

*f*,

**truncated**to 2 decimal places is 18.69. Write down the error interval for

*f*

**Question 8:**The quantity of water in a bottle,

*h*, rounded to the nearest whole number is 759ml. Write down the error interval for

*h*

**Question 9:**The number of daily commuters travelling by train,

*u*, correct to 3 significant figures is 86,500. Write down the error interval for

*u*

**Question 10:**The speed of a car,

*d*, rounded to the nearest whole number is 52km/h. Write down the error interval for

*d*

**Question 11:**A number,

*z*, correct to 3 significant figures is 6.37. Write down the error interval for

*z*

**Question 12:**The width of a box,

*h*, rounded to the nearest 10mm is 70mm. Write down the error interval for

*h*

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# Answers

**Question 1:**45,000 ≤

*v*< 55,000

**Question 2:**0.725 ≤

*k*< 0.735

**Question 3:**50 ≤

*m*< 149

**Question 4:**80.1 ≤

*r*< 80.2

**Question 5:**4.75 ≤

*n*< 4.85

**Question 6:**66.45 ≤

*t*< 66.55

**Question 7:**18.69 ≤

*f*< 18.70

**Question 8:**758.5 ≤

*h*< 759.5

**Question 9:**86,450 ≤

*u*< 86,549

**Question 10:**51.5 ≤

*d*< 52.5

**Question 11:**6.365 ≤

*z*< 6.375

**Question 12:**65 ≤

*m*< 75

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