Common Core: 3rd Grade Math : Common Core Math: Grade 3

Study concepts, example questions & explanations for Common Core: 3rd Grade Math

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Example Questions

Example Question #291 : Quadrilaterals

What is the area of the rectangle? 

Screen shot 2015 09 29 at 8.31.30 am

Possible Answers:

\(\displaystyle 11in^2\)

\(\displaystyle 13in^2\)

\(\displaystyle 14in^2\)

\(\displaystyle 15in^2\)

\(\displaystyle 12in^2\)

Correct answer:

\(\displaystyle 11in^2\)

Explanation:

The formula to find area is \(\displaystyle A=l\times w\). We are given the length and the width from the problem, so we can plug those values into our equation and solve. 

\(\displaystyle 11\times1=11in^2\)

*Area is the number of square units inside a shape, which is why area is always written with square units. 

Example Question #166 : Geometry

What is the area of the rectangle? 

Screen shot 2015 09 29 at 8.29.52 am

Possible Answers:

\(\displaystyle 89in^2\)

\(\displaystyle 88in^2\)

\(\displaystyle 84in^2\)

\(\displaystyle 80in^2\)

\(\displaystyle 82in^2\)

Correct answer:

\(\displaystyle 88in^2\)

Explanation:

The formula to find area is \(\displaystyle A=l\times w\). We are given the length and the width from the problem, so we can plug those values into our equation and solve. 

\(\displaystyle 11\times8=88in^2\)

*Area is the number of square units inside a shape, which is why area is always written with square units. 

Example Question #1 : Solve Real World And Mathematical Problems Involving Area: Ccss.Math.Content.3.Md.C.7b

What is the area of the rectangle? 


Screen shot 2015 09 29 at 8.29.29 am

Possible Answers:

\(\displaystyle 66in^2\)

\(\displaystyle 64in^2\)

\(\displaystyle 68in^2\)

\(\displaystyle 69in^2\)

\(\displaystyle 62in^2\)

Correct answer:

\(\displaystyle 66in^2\)

Explanation:

The formula to find area is \(\displaystyle A=l\times w\). We are given the length and the width from the problem, so we can plug those values into our equation and solve. 

\(\displaystyle 11\times6=66in^2\)

*Area is the number of square units inside a shape, which is why area is always written with square units. 

Example Question #292 : Quadrilaterals

What is the area of the rectangle? 


Screen shot 2015 09 29 at 8.28.37 am

Possible Answers:

\(\displaystyle 58in^2\)

\(\displaystyle 57in^2\)

\(\displaystyle 56in^2\)

\(\displaystyle 55in^2\)

\(\displaystyle 54in^2\)

Correct answer:

\(\displaystyle 54in^2\)

Explanation:

The formula to find area is \(\displaystyle A=l\times w\). We are given the length and the width from the problem, so we can plug those values into our equation and solve. 

\(\displaystyle 9\times6=54in^2\)

*Area is the number of square units inside a shape, which is why area is always written with square units. 

Example Question #62 : Rectangles

What is the area of the rectangle? 

Screen shot 2015 09 29 at 8.27.30 am

Possible Answers:

\(\displaystyle 32in^2\)

\(\displaystyle 36in^2\)

\(\displaystyle 34in^2\)

\(\displaystyle 35in^2\)

\(\displaystyle 33in^2\)

Correct answer:

\(\displaystyle 36in^2\)

Explanation:

The formula to find area is \(\displaystyle A=l\times w\). We are given the length and the width from the problem, so we can plug those values into our equation and solve. 

\(\displaystyle 9\times4=36in^2\)

*Area is the number of square units inside a shape, which is why area is always written with square units. 

Example Question #172 : Geometry

What is the area of the rectangle? 

Screen shot 2015 09 29 at 8.27.11 am

Possible Answers:

\(\displaystyle 46in^2\)

\(\displaystyle 44in^2\)

\(\displaystyle 50in^2\)

\(\displaystyle 48in^2\)

\(\displaystyle 42in^2\)

Correct answer:

\(\displaystyle 48in^2\)

Explanation:

The formula to find area is \(\displaystyle A=l\times w\). We are given the length and the width from the problem, so we can plug those values into our equation and solve. 

\(\displaystyle 12\times4=48in^2\)

*Area is the number of square units inside a shape, which is why area is always written with square units. 

Example Question #173 : Geometry

What is the area of the rectangle? 

Screen shot 2015 09 29 at 8.26.39 am

Possible Answers:

\(\displaystyle 96in^2\)

\(\displaystyle 97in^2\)

\(\displaystyle 99in^2\)

\(\displaystyle 95in^2\)

\(\displaystyle 98in^2\)

Correct answer:

\(\displaystyle 96in^2\)

Explanation:

The formula to find area is \(\displaystyle A=l\times w\). We are given the length and the width from the problem, so we can plug those values into our equation and solve. 

\(\displaystyle 12\times8=96in^2\)

*Area is the number of square units inside a shape, which is why area is always written with square units. 

Example Question #63 : Rectangles

What is the area of the rectangle? 


Screen shot 2015 09 29 at 8.16.34 am

Possible Answers:

\(\displaystyle 86in^2\)

\(\displaystyle 88in^2\)

\(\displaystyle 82in^2\)

\(\displaystyle 78in^2\)

\(\displaystyle 80in^2\)

Correct answer:

\(\displaystyle 80in^2\)

Explanation:

The formula to find area is \(\displaystyle A=l\times w\). We are given the length and the width from the problem, so we can plug those values into our equation and solve. 

\(\displaystyle 10\times8=80in^2\)

*Area is the number of square units inside a shape, which is why area is always written with square units. 

Example Question #175 : Geometry

What is the area of the rectangle? 

Screen shot 2015 09 29 at 8.15.51 am

Possible Answers:

\(\displaystyle 28in^2\)

\(\displaystyle 22in^2\)

\(\displaystyle 20in^2\)

\(\displaystyle 24in^2\)

\(\displaystyle 30in^2\)

Correct answer:

\(\displaystyle 20in^2\)

Explanation:

The formula to find area is \(\displaystyle A=l\times w\). We are given the length and the width from the problem, so we can plug those values into our equation and solve. 

\(\displaystyle 10\times2=20in^2\)

*Area is the number of square units inside a shape, which is why area is always written with square units. 

Example Question #176 : Geometry

What is the area of the rectangle? 

Screen shot 2015 09 29 at 8.15.23 am

Possible Answers:

\(\displaystyle 9in^2\)

\(\displaystyle 5in^2\)

\(\displaystyle 7in^2\)

\(\displaystyle 8in^2\)

\(\displaystyle 6in^2\)

Correct answer:

\(\displaystyle 6in^2\)

Explanation:

The formula to find area is \(\displaystyle A=l\times w\). We are given the length and the width from the problem, so we can plug those values into our equation and solve. 

\(\displaystyle 3\times2=6in^2\)

*Area is the number of square units inside a shape, which is why area is always written with square units. 

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