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

**Question 1:**The weight of a suitcase,

*b*,

**truncated**to 1 decimal place is 9.8kg. Write down the error interval for the weight of the suitcase.

**Question 2:**A number,

*m*, rounded to the nearest whole number is 83. Write down the error interval for

*m*

**Question 3:**A number,

*w*, rounded to the nearest whole number is 528. Write down the error interval for

*w*

**Question 4:**A number,

*t*, correct to 3 significant figures is 48.5. Write down the error interval for

*t*

**Question 5:**The length of a road,

*v*, rounded to 2 decimal places is 11.96km. Write down the error interval for the length of the road.

**Question 6:**The density of an alloy,

*g*, correct to 2 significant figures is 8.3g/cm

^{3}. Write down the error interval for

*g*

**Question 7:**The weight of a pencil case,

*h*, rounded to the nearest 100g is 200g. Write down the error interval for

*h*

**Question 8:**The number of passengers on a coach,

*w*, rounded to the nearest 10 is 50 people. Write down the error interval for

*w*

**Question 9:**The average height of a Year 6 student,

*z*,

**truncated**to 2 decimal places is 144.43cm. Write down the error interval for the average height.

**Question 10:**The area of a plot of land,

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

^{2}. Write down the error interval for

*c*

**Question 11:**The number of daily commuters travelling by train,

*k*, correct to 3 significant figures is 45,400. Write down the error interval for

*k*

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

*x*, rounded to 1 decimal place is 60.5cm. Write down the error interval for the length

*x*

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# Answers

**Question 1:**9.8 ≤

*b*< 9.9

**Question 2:**82.5 ≤

*m*< 83.5

**Question 3:**527.5 ≤

*w*< 528.5

**Question 4:**48.45 ≤

*t*< 48.55

**Question 5:**11.955 ≤

*v*< 11.965

**Question 6:**8.25 ≤

*g*< 8.35

**Question 7:**150 ≤

*h*< 250

**Question 8:**45 ≤

*w*< 54

**Question 9:**144.43 ≤

*z*< 144.44

**Question 10:**45,000 ≤

*c*< 55,000

**Question 11:**45,350 ≤

*k*< 45,449

**Question 12:**60.45 ≤

*x*< 60.55

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