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

**Question 1:**A number,

*h*, correct to 3 significant figures is 2.78. Write down the error interval for

*h*

**Question 2:**The area of a plot of land,

*z*, correct to 1 significant figure is 300m

^{2}. Write down the error interval for

*z*

**Question 3:**A number,

*y*,

**truncated**to 2 decimal places is 0.31. Write down the error interval for

*y*

**Question 4:**The number of daily commuters travelling by train,

*x*, correct to 3 significant figures is 80,600. Write down the error interval for

*x*

**Question 5:**A number,

*p*, rounded to the nearest whole number is 13. Write down the error interval for

*p*

**Question 6:**A number,

*r*,

**truncated**to 1 decimal place is 48.3. Write down the error interval for

*r*

**Question 7:**The number of peas in a pack,

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

*v*

**Question 8:**The length of a piece of string,

*m*, rounded to 1 decimal place is 17.0cm. Write down the error interval for the length

*m*

**Question 9:**A number,

*b*, rounded to 2 decimal places is 9.17. Write down the error interval for

*b*

**Question 10:**The weight of a crate,

*g*, correct to 2 significant figures is 7,300kg. Write down the error interval for

*g*

**Question 11:**A number,

*c*, rounded to the nearest whole number is 337. Write down the error interval for

*c*

**Question 12:**The number of passengers on a coach,

*c*, rounded to the nearest 10 is 70 people. Write down the error interval for

*c*

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# Answers

**Question 1:**2.775 ≤

*h*< 2.785

**Question 2:**250 ≤

*z*< 350

**Question 3:**0.31 ≤

*y*< 0.32

**Question 4:**80,550 ≤

*x*< 80,649

**Question 5:**12.5 ≤

*p*< 13.5

**Question 6:**48.3 ≤

*r*< 48.4

**Question 7:**350 ≤

*v*< 449

**Question 8:**16.95 ≤

*m*< 17.05

**Question 9:**9.165 ≤

*b*< 9.175

**Question 10:**7,250 ≤

*g*< 7,350

**Question 11:**336.5 ≤

*c*< 337.5

**Question 12:**65 ≤

*c*< 74

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