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 #82 : Algebra

At Bess's candy warehouse, she charges M for the first 5 pounds of candy that customers buy and P for each additional pound of candy. What is the cost of buying 128 ounces of candy from Bess's warehouse? (*Note: there are 16 ounces in a pound.)

Possible Answers:

Correct answer:

Explanation:

The first step is the convert ounces into pounds. Given that there are 16 ounces in a pound, there are 8 pounds in 128 ounces because 128 divided by 16 eequals 8. 

Since the first 5 pounds cost M, and each additional pound costs P, there are 3 additional pounds that will have to be paid for at the P price per pound. Thus, the appropriate formula to express the value of the cost of 128 ounces of candy (8 pounds) is:

Example Question #2171 : Isee Middle Level (Grades 7 8) Mathematics Achievement

Which of the following phrases can be written as the algebraic expression  ?

Possible Answers:

The product of seven and a number subtracted from eighty-eight

Seven multiplied by the difference of a number and eighty-eight

Seven multiplied by the difference of eighty-eight and a number

Eighty-eight subtracted from the product of seven and a number

The correct answer is not given among the other responses

Correct answer:

Eighty-eight subtracted from the product of seven and a number

Explanation:

 is eighty-eight subtracted from .

 is the product of seven and a number.

Subsequently,  is "eighty-eight subtracted from the product of seven and a number."

Example Question #2172 : Isee Middle Level (Grades 7 8) Mathematics Achievement

Suppose you know the values of all variables in the expression 

and you want to evaluate the expression.

In which order will you carry out the operations?

Possible Answers:

Multiplication, subtraction, addition

Subtraction, addition, multiplication

Subtraction, multiplication, addition

Addition, multiplication, subtraction

Multiplication, addition, subtraction

Correct answer:

Addition, multiplication, subtraction

Explanation:

By the order of operations, any expressions within grouping symbols, such as parentheses and brackets, are carried out from the inside outward. Therefore, the operation in the innermost set of grouping symbols - the addition within parentheses - will be carried out first, followed by the remaining operation within the brackets - the multiplication. The remaining operation - the subtraction - is last.

Example Question #54 : Operations

Solve for  in this equation:

Possible Answers:

Correct answer:

Explanation:

In order to solve for , cross multiplication must be used.

Next, each side must be divided by 4. This results in:

Example Question #59 : How To Multiply Variables

Multiply in modulo 7:

Possible Answers:

Correct answer:

Explanation:

In modulo 7 arithmetic, a number is congruent to the remainder of the divison of that number by 7. Since

and 

then 

.

The correct response is 2.

Example Question #60 : How To Multiply Variables

Simplify:

Possible Answers:

Correct answer:

Explanation:

Begin by moving all of the related variables (and constants) next to each other. You can group these in parentheses to make it clear. This is allowed because of the associative rule for multiplication.

When multiplying variables of the same type, you add their exponents together. This gets you:

This is the same as:

Example Question #61 : Algebraic Concepts

Simplify the following expression: 

Possible Answers:

The expression is already reduced. 

Correct answer:

Explanation:

When you multiple variables, the constants will be multiplied together and the variables will be combined.  

So that means that 

 

and 

 

so that leaves us with a final answer of 

.

Example Question #61 : Operations

Simplify the following expression:

Possible Answers:

Correct answer:

Explanation:

Simplify the following expression:

We can simplify this by combining like terms. We need to multiply the two pieces in parentheses. 

We can only combine variables with the same base. 

To multiply variables we must add their exponents.

The integers (whole numbers) can be combined via standard multiplication.

So, we should get the following:

So our answer is:

Example Question #63 : Variables

Simplify the following expression:

Possible Answers:

Correct answer:

Explanation:

To solve    distribute the  to each term in the parenthesis. Remember: When multiplying variables add the exponents.

Rewrite:

 

Example Question #61 : Operations

Possible Answers:

Correct answer:

Explanation:

Multiply the coefficients of the variable 

Then multiply the variables by adding the exponents:

 is the correct answer.

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