ISEE Lower Level Math : Operations

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

varsity tutors app store varsity tutors android store

Example Questions

Example Question #11 : How To Multiply

What expression is equivalent to:

Possible Answers:

Correct answer:

Explanation:

First, add the numbers in parentheses.

Now put the equation together.

 

Example Question #12 : How To Multiply

What expression is equal to 24?

Possible Answers:

Correct answer:

Explanation:

Remember the order of operations with the help of the acronym PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition, Subtraction.

Only one of the expressions in the answer choices which will give us the quantity we are looking for.

Example Question #13 : How To Multiply

If , what number does  stand for?

Possible Answers:

6

3

11

8

Correct answer:

8

Explanation:

There are two ways to solve this question: one is to try each answer in the place of , and another is to solve it with algebra.

To solve algebraically, first, divide both sides by 2:

Subtract 3 from both sides:

Example Question #176 : Numbers And Operations

__ ?

Possible Answers:

Correct answer:

Explanation:

There is a quick shortcut that you may notice in this problem (and problems like it) that will keep you from having to doing a lot of large computations. As you look at the left side of the equation, notice that you can factor out a  from the , which gives you a   on the left:

__ ?

__?

Now we can divide each side by , which leaves us with:

, which equals

, which equals

Example Question #177 : Numbers And Operations

Which of the following is a valid approximation of the problem:

Possible Answers:

Correct answer:

Explanation:

Round each of the numbers:

Multiply:

35 is a valid approximation for the problem. The precise answer is:

Example Question #14 : How To Multiply

Evaluate:

Possible Answers:

The expression is undefined.

Correct answer:

Explanation:

A negative number taken to an odd-numbered power is negative, so:

Example Question #182 : Numbers And Operations

Evaluate: 

Possible Answers:

Correct answer:

Explanation:

By order of operations, exponentiate first, then add:

Example Question #17 : Operations

Solve for :

Possible Answers:

Correct answer:

Explanation:

Example Question #18 : Operations

Mulitply:

Possible Answers:

Correct answer:

Explanation:

We ignore the decimals for the time being, multiplying:

Since, between them, the two original factors have a total of three digits to the right of their decimal points, we place the decimal point in the product so that there are three digits to the right. This yields:

Example Question #15 : How To Multiply

Multiply:  

Possible Answers:

Correct answer:

Explanation:

We ignore the decimals for the time being, multiplying:

Since, between them, the two original factors have a total of three digits to the right of their decimal points, we place the decimal point in the product so that there are three digits to the right. This yields:

Learning Tools by Varsity Tutors