Common Core: 4th Grade Math : Common Core Math: Grade 4

Study concepts, example questions & explanations for Common Core: 4th Grade Math

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Example Questions

Example Question #122 : Rectangles

Joe has a piece of wallpaper that is \(\displaystyle 5ft\) by \(\displaystyle 2ft\). How much of a wall can be covered by this piece of wallpaper?

 

Possible Answers:

\(\displaystyle 8ft^2\)

\(\displaystyle 10ft^2\)

\(\displaystyle 11ft^2\)

\(\displaystyle 9ft^2\)

\(\displaystyle 12ft^2\)

Correct answer:

\(\displaystyle 10ft^2\)

Explanation:

This problem asks us to calculate the amount of space that the wallpaper will cover. The amount of space that something covers can be described as its area. In this case area is calculated by using the formula \(\displaystyle A=l \times w\)

\(\displaystyle A=5\times2\)

\(\displaystyle A=10ft^2\)

Example Question #123 : Rectangles

Joe has a piece of wallpaper that is \(\displaystyle 7ft\) by \(\displaystyle 2ft\). How much of a wall can be covered by this piece of wallpaper?

 

Possible Answers:

\(\displaystyle 14ft^2\)

\(\displaystyle 16ft^2\)

\(\displaystyle 18ft^2\)

\(\displaystyle 17ft^2\)

\(\displaystyle 15ft^2\)

Correct answer:

\(\displaystyle 14ft^2\)

Explanation:

This problem asks us to calculate the amount of space that the wallpaper will cover. The amount of space that something covers can be described as its area. In this case area is calculated by using the formula \(\displaystyle A=l \times w\)

\(\displaystyle A=7\times2\)

\(\displaystyle A=14ft^2\)

Example Question #124 : Rectangles

Joe has a piece of wallpaper that is \(\displaystyle 9ft\) by \(\displaystyle 6ft\). How much of a wall can be covered by this piece of wallpaper?

 

Possible Answers:

\(\displaystyle 54ft^2\)

\(\displaystyle 57ft^2\)

\(\displaystyle 55ft^2\)

\(\displaystyle 53ft^2\)

\(\displaystyle 56ft^2\)

Correct answer:

\(\displaystyle 54ft^2\)

Explanation:

This problem asks us to calculate the amount of space that the wallpaper will cover. The amount of space that something covers can be described as its area. In this case area is calculated by using the formula \(\displaystyle A=l \times w\)

\(\displaystyle A=9\times6\)

\(\displaystyle A=54ft^2\)

Example Question #125 : Rectangles

Joe has a piece of wallpaper that is \(\displaystyle 5ft\) by \(\displaystyle 3ft\). How much of a wall can be covered by this piece of wallpaper?

 

Possible Answers:

\(\displaystyle 16ft^2\)

\(\displaystyle 14ft^2\)

\(\displaystyle 17ft^2\)

\(\displaystyle 13ft^2\)

\(\displaystyle 15ft^2\)

Correct answer:

\(\displaystyle 15ft^2\)

Explanation:

This problem asks us to calculate the amount of space that the wallpaper will cover. The amount of space that something covers can be described as its area. In this case area is calculated by using the formula \(\displaystyle A=l \times w\)

\(\displaystyle A=5\times3\)

\(\displaystyle A=15ft^2\)

Example Question #126 : Rectangles

Joe has a piece of wallpaper that is \(\displaystyle 9ft\) by \(\displaystyle 7ft\). How much of a wall can be covered by this piece of wallpaper?

 

Possible Answers:

\(\displaystyle 66ft^2\)

\(\displaystyle 63ft^2\)

\(\displaystyle 64ft^2\)

\(\displaystyle 65ft^2\)

\(\displaystyle 67ft^2\)

Correct answer:

\(\displaystyle 63ft^2\)

Explanation:

This problem asks us to calculate the amount of space that the wallpaper will cover. The amount of space that something covers can be described as its area. In this case area is calculated by using the formula \(\displaystyle A=l \times w\)

\(\displaystyle A=9\times7\)

\(\displaystyle A=63ft^2\)

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