ISEE Lower Level Math : Distributive Property

Study concepts, example questions & explanations for ISEE Lower Level Math

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Example Questions

Example Question #1 : Numbers And Operations

Solve the following equation.

\dpi{100} 3(2-5)=\displaystyle \dpi{100} 3(2-5)= ?

Possible Answers:

\dpi{100} 6\displaystyle \dpi{100} 6

\dpi{100} 9\displaystyle \dpi{100} 9

\dpi{100} -9\displaystyle \dpi{100} -9

\dpi{100} -6\displaystyle \dpi{100} -6

Correct answer:

\dpi{100} -9\displaystyle \dpi{100} -9

Explanation:

\dpi{100} 2-5=-3\displaystyle \dpi{100} 2-5=-3.

\dpi{100} 3\times -3=9\displaystyle \dpi{100} 3\times -3=9

Example Question #1 : Distributive Property

Solve

\displaystyle 4(6+3) - 9 =

Possible Answers:

\displaystyle 19

\displaystyle 26

\displaystyle 28

\displaystyle 45

\displaystyle 27

Correct answer:

\displaystyle 27

Explanation:

Use the distributive property to solve:

\displaystyle 4(6) + 4(3)= 36 - 9 = 27

Example Question #3 : Numbers And Operations

Expand the expression.

\displaystyle (x+2)(3x-5)

Possible Answers:

\displaystyle 3x^{2}-x-10

\displaystyle 3x^{2}-11x-10

\displaystyle 3x^{2}+x-10

\displaystyle 3x^{2}+x-3

\displaystyle 3x^{2}+11x+10

Correct answer:

\displaystyle 3x^{2}+x-10

Explanation:

Use FOIL (first, outer, inner, last) to expand.

First: \displaystyle (x)(3x)= 3x^{2}

Outside: \displaystyle (x)(-5) = -5x

Inside: \displaystyle (2)(3x)=6x

Last: \displaystyle (2)(-5) =-10

Sum the four terms into one expression.

\displaystyle 3x^{2}-5x+6x-10

Simplify by combining like terms.

\displaystyle 3x^2+x-10

Example Question #1 : Numbers And Operations

Simplify the expression:

\displaystyle 14x + 28 - 7x + 19

Possible Answers:

\displaystyle 7x - 9

\displaystyle 7x + 47

\displaystyle 7x + 9

\displaystyle 54x

\displaystyle 7x - 47

Correct answer:

\displaystyle 7x + 47

Explanation:

\displaystyle 14x + 28 - 7x + 19

\displaystyle =14x- 7x + 28 + 19

\displaystyle =\left (14- 7 \right )x + 28 + 19

\displaystyle =7x + 47

Example Question #1 : How To Find The Distributive Property

Simplify the expression:

\displaystyle 17x + 38 - 7x - 13

Possible Answers:

\displaystyle 10x + 51

\displaystyle 250x

\displaystyle 10x - 51

\displaystyle 10x - 25

\displaystyle 10x + 25

Correct answer:

\displaystyle 10x + 25

Explanation:

\displaystyle 17x + 38 - 7x - 13

\displaystyle =17x - 7x + 38 - 13

\displaystyle =\left (17 - 7 \right )x + 38 - 13

\displaystyle =10x + 25

Example Question #1 : Isee Lower Level (Grades 5 6) Mathematics Achievement

Use the distributive property to expand:

\displaystyle (-x-2)(2x+3)

 

Possible Answers:

\displaystyle -2x^{2}-x-6

\displaystyle -2x^{2}+7x-6

\displaystyle -2x^{2}-7x-6

\displaystyle 2x^{2}-7x-6

Correct answer:

\displaystyle -2x^{2}-7x-6

Explanation:

Remember: FOIL (first, outer, inner, last) to expand.

F: \displaystyle (-x)(2x)= -2x^{2}

O: \displaystyle (-x)(3) = -3x

I: \displaystyle (-2)(2x)=-4x

L: \displaystyle (-2)(3) =-6

 

Now you have four terms:\displaystyle -2x^{2}-3x-4x-6

Simplify: \displaystyle -2x^{2}-7x-6

Example Question #1 : Isee Lower Level (Grades 5 6) Mathematics Achievement

Evaluate.

\displaystyle 25 - 2(3 \times 2)

Possible Answers:

\displaystyle 19

None of the other answers.

\displaystyle 22

\displaystyle 23

\displaystyle 13

Correct answer:

\displaystyle 13

Explanation:

When there is any number next to a set of parentheses the operation is multiplication of that number and anything inside of the parentheses.

Therefore, \displaystyle 2(3 \times 2) would be the same as  \displaystyle 2(6)\: \: [Since \: 3 \times 2 = 6]. The \displaystyle 2 would be multiplied by the \displaystyle 6 since \displaystyle 2(6) is the same as \displaystyle 2 \times 6.

The problem becomes \displaystyle 25 - 2 \times 6 and based on the order of operations the multiplication operation would be solved first. \displaystyle [2 \times 6 = 12]

It solves to \displaystyle 25 - 12 = 13.

Example Question #1 : Isee Lower Level (Grades 5 6) Mathematics Achievement

Choose the expression that correctly uses the distributive property to solve:

\displaystyle 5\times (12-8)

Possible Answers:

\displaystyle (5\times 12)-8

\displaystyle (5\times 12)-(5\times 8)

\displaystyle (5+12)\times (5+8)

\displaystyle (5\times 12)+(5\times 8)

\displaystyle 5\times 12-8

Correct answer:

\displaystyle (5\times 12)-(5\times 8)

Explanation:

To properly use the distributive property, multiple the first number by every number in parentheses:

\displaystyle (5\times 12)-(5\times 8)

Example Question #2 : Isee Lower Level (Grades 5 6) Mathematics Achievement

Multiply:

\displaystyle -x(4x+7)

Possible Answers:

\displaystyle 4x^2+7x

\displaystyle 4x^2-7x

\displaystyle -4x^2+7x

\displaystyle -4x^2-7x

Correct answer:

\displaystyle -4x^2-7x

Explanation:

\displaystyle -x(4x+7)=(-x)(4x)+(-x)(7)=(-4x^2)+(-7x)=-4x^2-7x

Example Question #10 : Numbers And Operations

Multiply:

\displaystyle (3+x)(2-4x)

Possible Answers:

\displaystyle 6+10x-4x^2

\displaystyle 6-10x-4x^2

\displaystyle 6-14x+4x^2

\displaystyle 6+14x+4x^2

Correct answer:

\displaystyle 6-10x-4x^2

Explanation:

Solve using the FOIL method:

First: \displaystyle (3)(2)=6

Outside: \displaystyle (3)(-4x)=-12x

Inside: \displaystyle (x)(2)=2x

Last: \displaystyle (x)(-4x)=-4x^2

Add together and combine like terms:

\displaystyle 6-12x+2x-4x^2=6-10x-4x^2

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