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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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All Common Core: 4th Grade Math Resources

7 Diagnostic Tests 189 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

Example Question #34 : Rectangles

What is the length of a rectangular room with an area of 100ft^2 and a width of 5ft?

Possible Answers:

25ft

10ft

15ft

30ft

20ft

Correct answer:

20ft

Explanation:

$A=l\times w$

We have the area and the width, so we can plug those values into our equation and solve for our unknown.

$100=l\times 5$

$\frac{100}{5}=\frac{l\times 5}{5}$

20=l

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Example Question #71 : Parallelograms

What is the length of a rectangular room with an area of 120ft^2 and a width of 10ft?

Possible Answers:

12ft

11ft

8ft

9ft

14ft

Correct answer:

12ft

Explanation:

$A=l\times w$

We have the area and the width, so we can plug those values into our equation and solve for our unknown.

$120=l\times 10$

$\frac{120}{10}=\frac{l\times 10}{10}$

12=l

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Example Question #83 : Quadrilaterals

What is the length of a rectangular room with an area of 48ft^2 and a width of 8ft?

Possible Answers:

7ft

5ft

9ft

6ft

8ft

Correct answer:

6ft

Explanation:

$A=l\times w$

We have the area and the width, so we can plug those values into our equation and solve for our unknown.

$48=l\times 8$

$\frac{48}{8}=\frac{l\times 8}{8}$

6=l

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Example Question #41 : Rectangles

What is the length of a rectangular room with an area of 99ft^2 and a width of 9ft?

Possible Answers:

11ft

9ft

7ft

10ft

8ft

Correct answer:

11ft

Explanation:

$A=l\times w$

We have the area and the width, so we can plug those values into our equation and solve for our unknown.

$99=l\times 9$

$\frac{99}{9}=\frac{l\times 9}{9}$

11=l

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Example Question #41 : How To Find The Area Of A Rectangle

What is the length of a rectangular room with an area of 72ft^2 and a width of 8ft?

Possible Answers:

13ft

9ft

10ft

11ft

12ft

Correct answer:

9ft

Explanation:

$A=l\times w$

We have the area and the width, so we can plug those values into our equation and solve for our unknown.

$72=l\times 8$

$\frac{72}{8}=\frac{l\times 8}{8}$

9=l

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Example Question #84 : Quadrilaterals

What is the length of a rectangular room with an area of 80ft^2 and a width of 8ft?

Possible Answers:

7ft

6ft

8ft

9ft

10ft

Correct answer:

10ft

Explanation:

$A=l\times w$

We have the area and the width, so we can plug those values into our equation and solve for our unknown.

$80=l\times 8$

$\frac{80}{8}=\frac{l\times 8}{8}$

10=l

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Example Question #85 : Quadrilaterals

What is the length of a rectangular room with an area of 42ft^2 and a width of 7ft?

Possible Answers:

5ft

6ft

4ft

8ft

7ft

Correct answer:

6ft

Explanation:

$A=l\times w$

We have the area and the width, so we can plug those values into our equation and solve for our unknown.

$42=l\times 7$

$\frac{42}{7}=\frac{l\times 7}{7}$

6=l

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Example Question #42 : Rectangles

What is the length of a rectangular room with an area of 49ft^2 and a width of 7ft?

Possible Answers:

4ft

8ft

5ft

6ft

7ft

Correct answer:

7ft

Explanation:

$A=l\times w$

We have the area and the width, so we can plug those values into our equation and solve for our unknown.

$49=l\times 7$

$\frac{49}{7}=\frac{l\times 7}{7}$

7=l

Report an Error

Example Question #43 : Rectangles

What is the length of a rectangular room with an area of 60ft^2 and a width of 12ft?

Possible Answers:

6ft

5ft

7ft

4ft

8ft

Correct answer:

5ft

Explanation:

$A=l\times w$

We have the area and the width, so we can plug those values into our equation and solve for our unknown.

$60=l\times 12$

$\frac{60}{12}=\frac{l\times 12}{12}$

5=l

Report an Error

Example Question #44 : Rectangles

What is the length of a rectangular room with an area of 63ft^2 and a width of 7ft?

Possible Answers:

9ft

8ft

5ft

4ft

7ft

Correct answer:

9ft

Explanation:

$A=l\times w$

We have the area and the width, so we can plug those values into our equation and solve for our unknown.

$63=l\times 7$

$\frac{63}{7}=\frac{l\times 7}{7}$

9=l

Report an Error

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All Common Core: 4th Grade Math Resources

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

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

All Common Core: 4th Grade Math Resources

Example Questions

Example Question #34 : Rectangles

Example Question #71 : Parallelograms

Example Question #83 : Quadrilaterals

Example Question #41 : Rectangles

Example Question #41 : How To Find The Area Of A Rectangle

Example Question #84 : Quadrilaterals

Example Question #85 : Quadrilaterals

Example Question #42 : Rectangles

Example Question #43 : Rectangles

Example Question #44 : Rectangles

All Common Core: 4th Grade Math Resources

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