SSAT Middle Level Math : Distributive Property

Study concepts, example questions & explanations for SSAT Middle Level Math

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Example Questions

Example Question #1 : Distributive Property

\(\displaystyle 3\times(4+\frac{1}{3})= ?\)

Possible Answers:

\(\displaystyle 8\)

\(\displaystyle 21\)

\(\displaystyle 12+\frac{1}{3}\)

\(\displaystyle 15+\frac{2}{3}\)

\(\displaystyle 13\)

Correct answer:

\(\displaystyle 13\)

Explanation:

Using the distributive property we get: \(\displaystyle (3\times4)+(3\times \frac{1}{3})=12+1=13\)

Example Question #1 : Distributive Property

Which of the following expressions is equivalent to the expression \(\displaystyle -6 (-3x+7)\) ?

Possible Answers:

\(\displaystyle -18x - 42\)

\(\displaystyle 18x - 42\)

\(\displaystyle 18x +42\)

\(\displaystyle 18x +7\)

\(\displaystyle 18x -7\)

Correct answer:

\(\displaystyle 18x - 42\)

Explanation:

By the distributive property of multiplication over addition,

\(\displaystyle -6 (-3x+7) = -6 \cdot (-3x) +(-6)\cdot 7 = 18x + (-42)= 18x - 42\)

Example Question #3 : How To Find The Distributive Property

Which of the following expressions is equivalent to the expression \(\displaystyle 8 (-2x+7)\) ?

Possible Answers:

\(\displaystyle -16x+56\)

\(\displaystyle -16x+7\)

\(\displaystyle 16x-7\)

\(\displaystyle -16x-56\)

\(\displaystyle 16x+7\)

Correct answer:

\(\displaystyle -16x+56\)

Explanation:

By the distributive property of multiplication over addition,

\(\displaystyle 8 (-2x+7) = 8 (-2x)+8\cdot 7 = -16x + 56\) 

Example Question #1 : How To Find The Distributive Property

Simplify the expression: \(\displaystyle 11y - 3y + 4y\)

Possible Answers:

\(\displaystyle 4y\)

\(\displaystyle -132y^3\)

\(\displaystyle 12y\)

\(\displaystyle 18y\)

\(\displaystyle -132y\)

Correct answer:

\(\displaystyle 12y\)

Explanation:

Apply the distributive property:

\(\displaystyle 11y - 3y + 4y\)

\(\displaystyle = \left (11 - 3 + 4 \right ) y\)

\(\displaystyle = \left (8 + 4 \right ) y\)

\(\displaystyle =12 y\)

Example Question #2 : How To Find The Distributive Property

Simplify the expression: \(\displaystyle 7 (y+5)\)

Possible Answers:

\(\displaystyle y+12\)

\(\displaystyle 7y+35\)

\(\displaystyle y+35\)

\(\displaystyle 7y+12\)

\(\displaystyle 7y+5\)

Correct answer:

\(\displaystyle 7y+35\)

Explanation:

Apply the distributive property:

\(\displaystyle 7 (y+5)\)

\(\displaystyle = 7 \cdot y+7 \cdot5\)

\(\displaystyle = 7 y+35\)

Example Question #2 : How To Find The Distributive Property

Which of the following is an example of an application of the distributive property?

Possible Answers:

\(\displaystyle 13 + (54 \times 14) = 13 +(14 \times 54)\)

\(\displaystyle 13 + (54 \times 14) = (54 \times 14) + 13\)

\(\displaystyle 13 \times (54 \times 14) = \left (13 \times 54 \right ) \times 14\)

\(\displaystyle 13 \times (54 + 14) = 13 \times 54 + 13 \times 14\)

\(\displaystyle 1 \times (54 \times 14) =54 \times 14\)

Correct answer:

\(\displaystyle 13 \times (54 + 14) = 13 \times 54 + 13 \times 14\)

Explanation:

According to the distributive property, for any values of \(\displaystyle a,b,c\)

\(\displaystyle a (b + c) = a \cdot b + a \cdot c\)

If we set \(\displaystyle a=13,b=54,c=14\), this become the statement 

\(\displaystyle 13 \times (54 + 14) = 13 \times 54 + 13 \times 14\),

so this is the correct choice.

 

All of the other statements are true for different reasons:

 

\(\displaystyle 13 \times (54 \times 14) = \left (13 \times 54 \right ) \times 14\) is true because of the associative property of multiplication.

\(\displaystyle 13 + (54 \times 14) = 13 +(14 \times 54)\) is true because of the commutative property of multiplication.

\(\displaystyle 13 + (54 \times 14) = (54 \times 14) + 13\) is true because of the commutative property of addition.

\(\displaystyle 1 \times (54 \times 14) =54 \times 14\) is true because of the identity property of multiplication.

Example Question #2 : How To Find The Distributive Property

Simplify the expression:

\(\displaystyle 8x - 7 (3x+ 6) - 5\)

Possible Answers:

\(\displaystyle -13 x - 47\)

\(\displaystyle -13 x - 37\)

\(\displaystyle -13 x + 1\)

\(\displaystyle -13 x + 37\)

\(\displaystyle -13 x - 1\)

Correct answer:

\(\displaystyle -13 x - 47\)

Explanation:

Distribute, then collect like terms:

\(\displaystyle 8x - 7 (3x+ 6) - 5\)

\(\displaystyle =8x - 7 \cdot 3x - 7 \cdot 6 - 5\)

\(\displaystyle =8x - 21x - 42 - 5\)

\(\displaystyle = \left ( 8 - 21 \right ) x - 42 - 5\)

\(\displaystyle = -13 x - 47\)

Example Question #3 : How To Find The Distributive Property

Diana is thirty-three years older than her son Colin, who is three times as old as her niece Sharon. If \(\displaystyle D\) is Diana's age, how old is Sharon?

Possible Answers:

\(\displaystyle \frac{1}{3}D - 33\)

\(\displaystyle \frac{1}{3}D + 11\)

\(\displaystyle \frac{1}{3}D - 11\)

\(\displaystyle 3D-33\)

\(\displaystyle 3D - 99\)

Correct answer:

\(\displaystyle \frac{1}{3}D - 11\)

Explanation:

Colin's age is thirty-three years less than Diana's age of \(\displaystyle D\), so Colin is \(\displaystyle D -33\) years old; Sharon is one-third of this, or \(\displaystyle \frac{1}{3 }\left (D -33 \right )\). Using distribution, this can be rewritten as

 \(\displaystyle \frac{1}{3 }\left (D -33 \right ) = \frac{1}{3 } \cdot D - \frac{1}{3 } \cdot 33 = \frac{1}{3}D - 11\) .

Example Question #3 : How To Find The Distributive Property

Nina is twenty-one years younger than her mother Caroline, who is one-third as old as their neighbor Mr. Hutchinson. If \(\displaystyle N\) is Nina's age, how old is Mr. Hutchinson?

Possible Answers:

\(\displaystyle 3N + 63\)

\(\displaystyle \frac{1}{3}N - 21\)

\(\displaystyle 3N + 7\)

\(\displaystyle \frac{1}{3}N - 7\)

\(\displaystyle 3N + 21\)

Correct answer:

\(\displaystyle 3N + 63\)

Explanation:

Caroline is twenty-one years older than Nina, so her age is \(\displaystyle N + 21\). Mr. Hutchinson is three times as old as Caroline, so he is \(\displaystyle 3\left (N + 21 \right )\). Using distribution, this can be rewritten as 

\(\displaystyle 3\left (N + 21 \right ) = 3 \cdot N + 3 \cdot 21= 3N + 63\).

Example Question #4 : How To Find The Distributive Property

Which of the following expressions is equivalent to \(\displaystyle x(2-k)\)?

Possible Answers:

\(\displaystyle 2(k-x)\)

\(\displaystyle 2x-2k\)

\(\displaystyle 2x-kx\)

\(\displaystyle x(k+2)\)

Correct answer:

\(\displaystyle 2x-kx\)

Explanation:

When distributing, the number outside the parentheses is multiplied by both of the numbers inside without changing any signs.

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