ISEE Middle Level Math : Distributive Property

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

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Example Questions

Example Question #1 : How To Find The Distributive Property

Which of the following expressions is equivalent to the expression below?

\(\displaystyle -7 (x - 9)\)

Possible Answers:

\(\displaystyle -7x - 63\)

\(\displaystyle -7x - 9\)

\(\displaystyle 63x\)

\(\displaystyle -7x+9\)

\(\displaystyle -7x + 63\)

Correct answer:

\(\displaystyle -7x + 63\)

Explanation:

First, we can distribute the \(\displaystyle -7\) into the parentheses.

\(\displaystyle -7 (x - 9) = (-7 * x) - (-7*9)\)

Now we can simplify the terms.

\(\displaystyle (-7*x)-(-7*9)= -7 x - (-63)\)

Subtracting a negative is the same as adding a positive.

\(\displaystyle -7x-(-63)= -7x+63\)

Example Question #1 : How To Find The Distributive Property

\(\displaystyle 3\left ( 4+5 \right )=\)

Possible Answers:

\(\displaystyle 27\)

\(\displaystyle 3\)

\(\displaystyle 60\)

\(\displaystyle 12\)

Correct answer:

\(\displaystyle 27\)

Explanation:

Using the distributive property, multiply 3 times each of the numbers in parentheses, then add both products:

\(\displaystyle 3*4=12\)

\(\displaystyle 3*5=15\)

\(\displaystyle 12+15=27\)

The answer is 27.

Alternatively, add the two terms inside the parentheses and then multiply the sum by 3:

\(\displaystyle 3(4+5)=3(9)=27\)

Example Question #2 : How To Find The Distributive Property

\(\displaystyle \frac{5(3+4)}{5}=\)

Possible Answers:

\(\displaystyle 12\)

\(\displaystyle 5\)

\(\displaystyle 2.4\)

\(\displaystyle 7\)

Correct answer:

\(\displaystyle 7\)

Explanation:

First, using the distributive property, multiply 5 times each number in parenthesis, then add the products.

\(\displaystyle 5*3=15\)

\(\displaystyle 5*4=20\)

\(\displaystyle 15+20=35\)

Finally, divide the numerator by the denominator.

\(\displaystyle \frac{35}{5}=7\)

The answer is 7.

Alternatively, first cancel the 5s and then add the terms in the parentheses:

\(\displaystyle \frac{5(3+4)}{5}=(3+4)=7\)

Example Question #1 : How To Find The Distributive Property

Simplify the expression: \(\displaystyle 9 (y-6)\)

Possible Answers:

\(\displaystyle y-15\)

\(\displaystyle 9y-6\)

\(\displaystyle y-54\)

\(\displaystyle 9y-54\)

\(\displaystyle 9y-15\)

Correct answer:

\(\displaystyle 9y-54\)

Explanation:

Apply the distributive property:

\(\displaystyle 9 (y-6)\)

\(\displaystyle =9 \cdot y-9 \cdot 6\)

\(\displaystyle =9 y-54\)

Example Question #1 : How To Find The Distributive Property

Simplify the expression: \(\displaystyle 9y - 3y + 5y\)

Possible Answers:

\(\displaystyle 11y\)

\(\displaystyle y\)

\(\displaystyle 17y\)

\(\displaystyle -135y^{3}\)

\(\displaystyle -135y\)

Correct answer:

\(\displaystyle 11y\)

Explanation:

Apply the distributive property:

\(\displaystyle 9y - 3y + 5y\)

\(\displaystyle = \left (9- 3 + 5 \right ) y\)

\(\displaystyle = \left (6 + 5 \right ) y\)

\(\displaystyle = 11y\)

Example Question #1 : How To Find The Distributive Property

Which of the following expressions is equal to \(\displaystyle 10 \times (5+8)\) according to the distributive property of multiplication over addition?

Possible Answers:

\(\displaystyle 10 \times (8+5)\)

\(\displaystyle 10 \times 5 + 8\)

\(\displaystyle 10 \times 5 \times8\)

\(\displaystyle (5+8) \times 10\)

\(\displaystyle 10 \times 5+10 \times8\)

Correct answer:

\(\displaystyle 10 \times 5+10 \times8\)

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 \(\displaystyle a=10,b=5,c=8\), this becomes the statement

\(\displaystyle 10 \times (5+8) = 10 \times 5+10 \times8\).

 

Note that two of the other choices are equal to \(\displaystyle 10 \times (5+8)\), but for different reasons; \(\displaystyle 10 \times (8+5)\) is equivalent because of the commutative property of addition, and \(\displaystyle (5+8) \times 10\) is equivalent because of the commutative property of multiplication. The other two choices are not equal to \(\displaystyle 10 \times (5+8)\) at all.

Example Question #2 : How To Find The Distributive Property

\(\displaystyle 14(11+2)=\)

Possible Answers:

\(\displaystyle 126\)

\(\displaystyle 154\)

\(\displaystyle 182\)

\(\displaystyle 180\)

Correct answer:

\(\displaystyle 182\)

Explanation:

\(\displaystyle 14(11+2)\)

\(\displaystyle =14(13)\)

\(\displaystyle =182\)

 

 

 

 

 

 

Example Question #3 : How To Find The Distributive Property

\(\displaystyle 11(7-3)=\)

Possible Answers:

\(\displaystyle 77\)

\(\displaystyle 110\)

\(\displaystyle 33\)

\(\displaystyle -44\)

\(\displaystyle 44\)

Correct answer:

\(\displaystyle 44\)

Explanation:

\(\displaystyle 11(7-3)=11(4)=44\)

Example Question #4 : How To Find The Distributive Property

\(\displaystyle 7( 5+8)=\)

Possible Answers:

\(\displaystyle 91\)

\(\displaystyle 81\)

\(\displaystyle 90\)

\(\displaystyle 280\)

\(\displaystyle 20\)

Correct answer:

\(\displaystyle 91\)

Explanation:

First add the terms inside the parentheses, then multiply:

\(\displaystyle 7( 5+8)=7(13)=91\)

 

 

Example Question #5 : How To Find The Distributive Property

\(\displaystyle 8(9-1)=\)

Possible Answers:

\(\displaystyle 72\)

\(\displaystyle 16\)

\(\displaystyle 64\)

\(\displaystyle 80\)

\(\displaystyle 17\)

Correct answer:

\(\displaystyle 64\)

Explanation:

Subtract the terms inside the parentheses, and then multiply by the term outside of the parentheses:

\(\displaystyle 8(9-1)=8(8)=64\)

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