ISEE Middle Level Math : ISEE Middle Level (grades 7-8) Mathematics Achievement

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

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Example Questions

Example Question #1541 : Isee Middle Level (Grades 7 8) Mathematics Achievement

 

\displaystyle 13(9+0)=

Possible Answers:

\displaystyle 130

\displaystyle 90

\displaystyle 0

\displaystyle 117

Correct answer:

\displaystyle 117

Explanation:

First perform the operations in parentheses; then multiply:

\displaystyle 13(9+0)=13(9)=117

Answer: \displaystyle 117

Example Question #1542 : Isee Middle Level (Grades 7 8) Mathematics Achievement

 

\displaystyle 7(24+8)=

Possible Answers:

\displaystyle 225

\displaystyle 224

\displaystyle 39

\displaystyle 30

Correct answer:

\displaystyle 224

Explanation:

According to the order of operations, we must first complete the addition, and then the multiplication:

\displaystyle 7(24+8)=7(32)=224

Answer: \displaystyle 224

Example Question #1543 : Isee Middle Level (Grades 7 8) Mathematics Achievement

Which equation demonstrates the distributive property?

Possible Answers:

\displaystyle 8\div24=8\div20 +8\div4

\displaystyle 8\times24=8\times20\times4

\displaystyle 8 (24)=8 \times10+8\times10+8\times4

\displaystyle 8\times24=8+20\times8+4

Correct answer:

\displaystyle 8 (24)=8 \times10+8\times10+8\times4

Explanation:

The distributive property is explained in the following equation:\displaystyle a\times (b+c)=a\times b+a\times c

It is important to remember that the distributive property does not apply to division.  

 

 

Example Question #92 : How To Find The Distributive Property

Simplify the following algebraic expression:

\displaystyle 6(x +20)

Possible Answers:

\displaystyle 6 +x + 26

\displaystyle 6x +120

\displaystyle 6x + 26

\displaystyle 120x

Correct answer:

\displaystyle 6x +120

Explanation:

According to the distributive property, when you multiply a number or variable by the sum of a group of numbers or variables, you will get the same answer as multiplying each number or variable separately and then adding the products together.  

It is represented by the following equation:

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

Therefore, in this question:

\displaystyle 6 (x+ 20) = 6\times x +6\times20 

or 

\displaystyle 6x + 120

Example Question #1544 : Isee Middle Level (Grades 7 8) Mathematics Achievement

Solve using the distributive property:

\displaystyle 6(3+4)=

Possible Answers:

\displaystyle 72

\displaystyle 42

\displaystyle 48

\displaystyle 24

Correct answer:

\displaystyle 42

Explanation:

First multiply 6 by each number in parentheses:

\displaystyle 6*3=18

\displaystyle 6*4=24

Then solve equation: \displaystyle 18+24=42

Answer: \displaystyle 42

Example Question #1545 : Isee Middle Level (Grades 7 8) Mathematics Achievement

\displaystyle 10(x-y)=10x-10y, is this expression true under the distributive property?

Possible Answers:

\displaystyle True

\displaystyle False

Correct answer:

\displaystyle True

Explanation:

The distributive property says that when a value is multiplied by a parentheses, you multiply the value be each value in the parentheses.  

For this expression you do \displaystyle 10 times \displaystyle x and also \displaystyle -y giving you \displaystyle 10x-10y.

Example Question #1546 : Isee Middle Level (Grades 7 8) Mathematics Achievement

What is an equivalent expression to the following expression?

\displaystyle 3x-15

Possible Answers:

\displaystyle 3x(5)

\displaystyle 3x(15)

\displaystyle 3(3x-5)

\displaystyle 3(x-5)

\displaystyle x(5-3)

Correct answer:

\displaystyle 3(x-5)

Explanation:

For this expression, you can undue the distributive property and take out a common term instead.  

They have a common factor of \displaystyle 3 so you can divide both by that value and put it outside a set of parantheses around the expression.  

\displaystyle 3x-15=3\cdot1x-3\cdot 5

Your final answer would look like this: 

\displaystyle 3(x-5).

Example Question #1546 : Isee Middle Level (Grades 7 8) Mathematics Achievement

Find the mean in this set of numbers: \displaystyle 216, 261, 204

Possible Answers:

\displaystyle 3

\displaystyle 216

\displaystyle 228

\displaystyle 227

Correct answer:

\displaystyle 227

Explanation:

To solve , first add all the numbers in the set: \displaystyle 216+261+204=681

Then divide by the amount of numbers in the set: \displaystyle 681\div 3=227

Answer: The mean is \displaystyle 227

Example Question #1547 : Isee Middle Level (Grades 7 8) Mathematics Achievement

Solve using the distributive property:

\displaystyle 7(14+11)

Possible Answers:

\displaystyle 177

\displaystyle 175

\displaystyle 170

\displaystyle 180

Correct answer:

\displaystyle 175

Explanation:

To solve, first multiply each number in parenthesis by 7:

\displaystyle 7*14=98

\displaystyle 7*11=77

Then, solve the equation: \displaystyle 98+77=175

Answer: \displaystyle 175

Example Question #1548 : Isee Middle Level (Grades 7 8) Mathematics Achievement

Solve using the distributive property:

\displaystyle 5(16+2)

Possible Answers:

\displaystyle 70

\displaystyle 13

\displaystyle 90

\displaystyle 23

Correct answer:

\displaystyle 90

Explanation:

To solve: first multiply the number outside the brackets. \displaystyle 5*16=80

Then multiply: \displaystyle 5*2=10

Then add the products: \displaystyle 80+10=90

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