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

**Question 1:**A number,

*m*, rounded to the nearest whole number is 67. Write down the error interval for

*m*

**Question 2:**A number,

*s*, rounded to 2 decimal places is 12.23. Write down the error interval for

*s*

**Question 3:**A number,

*v*,

**truncated**to 2 decimal places is 5.52. Write down the error interval for

*v*

**Question 4:**The quantity of water in a bottle,

*r*, rounded to the nearest whole number is 570ml. Write down the error interval for

*r*

**Question 5:**The length of a piece of string,

*y*, rounded to 1 decimal place is 40.8cm. Write down the error interval for the length

*y*

**Question 6:**A number,

*f*, correct to 3 significant figures is 1.60. Write down the error interval for

*f*

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

*j*, correct to 1 significant figure is 80cm

^{3}. Write down the error interval for

*j*

**Question 8:**The density of an alloy,

*k*, correct to 2 significant figures is 5.9g/cm

^{3}. Write down the error interval for

*k*

**Question 9:**A number,

*p*,

**truncated**to 1 decimal place is 2.9. Write down the error interval for

*p*

**Question 10:**The number of daily commuters travelling by train,

*h*, correct to 3 significant figures is 81,300. Write down the error interval for

*h*

**Question 11:**The width of a box,

*r*, rounded to the nearest 10mm is 90mm. Write down the error interval for

*r*

**Question 12:**The weight of a pencil case,

*d*, rounded to the nearest 100g is 800g. Write down the error interval for

*d*

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# Answers

**Question 1:**66.5 ≤

*m*< 67.5

**Question 2:**12.225 ≤

*s*< 12.235

**Question 3:**5.52 ≤

*v*< 5.53

**Question 4:**569.5 ≤

*r*< 570.5

**Question 5:**40.75 ≤

*y*< 40.85

**Question 6:**1.595 ≤

*f*< 1.605

**Question 7:**75 ≤

*j*< 85

**Question 8:**5.85 ≤

*k*< 5.95

**Question 9:**2.9 ≤

*p*< 3.0

**Question 10:**81,250 ≤

*h*< 81,349

**Question 11:**85 ≤

*d*< 95

**Question 12:**750 ≤

*d*< 850

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