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

**Question 1:**The length of a piece of string,

*d*, rounded to 1 decimal place is 80.4cm. Write down the error interval for the length

*d*

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

*s*, rounded to the nearest whole number is 26km/h. Write down the error interval for

*s*

**Question 3:**The quantity of water in a bottle,

*h*, rounded to the nearest whole number is 433ml. Write down the error interval for

*h*

**Question 4:**The length of a road,

*w*, rounded to 2 decimal places is 16.78km. Write down the error interval for the length of the road.

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

*r*, correct to 2 significant figures is 6.1g/cm

^{3}. Write down the error interval for

*r*

**Question 6:**The weight of a pencil case,

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

*u*

**Question 7:**The area of a plot of land,

*q*, correct to 1 significant figure is 8,000m

^{2}. Write down the error interval for

*q*

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

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

*h*

**Question 9:**A number,

*c*, correct to 3 significant figures is 1.74. Write down the error interval for

*c*

**Question 10:**The average height of a Year 6 student,

*g*,

**truncated**to 2 decimal places is 145.04cm. Write down the error interval for the average height.

**Question 11:**The weight of a suitcase,

*x*,

**truncated**to 1 decimal place is 9.2kg. Write down the error interval for the weight of the suitcase.

**Question 12:**The number of pies in a factory,

*z*, correct to 3 significant figures is 7,770 pies. Write down the error interval for

*z*

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# Answers

**Question 1:**80.35 ≤

*d*< 80.45

**Question 2:**25.5 ≤

*s*< 26.5

**Question 3:**432.5 ≤

*h*< 433.5

**Question 4:**16.775 ≤

*w*< 16.785

**Question 5:**6.05 ≤

*r*< 6.15

**Question 6:**50 ≤

*u*< 150

**Question 7:**7,500 ≤

*q*< 8,500

**Question 8:**45 ≤

*h*< 54

**Question 9:**1.735 ≤

*c*< 1.745

**Question 10:**145.04 ≤

*g*< 145.05

**Question 11:**9.2 ≤

*x*< 9.3

**Question 12:**7,765 ≤

*z*< 7,775

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