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Pre-Algebra : Operations

Study concepts, example questions & explanations for Pre-Algebra

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11 Diagnostic Tests 177 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

Example Question #3 : Add And Subtract Rational Numbers: Ccss.Math.Content.7.Ns.A.1d

Solve:

-2+(-9)+(2-9)

Possible Answers:

Correct answer:

Explanation:

Solve by first combining signs and eliminate the parentheses.

A positive multiplied with a negative sign will give a negative sign.

-2+(-9)+(2-9) = -2-9+2-9 = -18

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Example Question #92 : Negative Numbers

Solve:

$-3\times4$

Possible Answers:

Correct answer:

Explanation:

First, since we are multiplying a negative value with a positive value, we need to realize the product is going to be negative. Next, we can multiply the values.

$3\times4=12$

Since the answer is negative, the answer is .

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Example Question #1 : Divide Integers: Ccss.Math.Content.7.Ns.A.2b

Solve:

$-90\div-6$

Possible Answers:

Correct answer:

Explanation:

When dividing with two negative values, the answer becomes positive. Then we just divide by , which equals . The answer is +15 or .

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Example Question #8 : Divide Integers: Ccss.Math.Content.7.Ns.A.2b

Solve:

$-18\div6$

Possible Answers:

Correct answer:

Explanation:

When dividing with negative numbers, we count the number of negative numbers. We have one so that means the answer is negative. So the quotient is .

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Example Question #311 : Operations

Solve:

$-3\left(\frac{-2-6}{-4}\right)$

Possible Answers:

Correct answer:

Explanation:

When solving this problem remember our orders of operation, or PEMDAS.

PEMDAS stands for parentheses, exponents, multiplication/division, and addition/subtraction. When you have a problem with several different operations, you need to solve the problem in this order and you work from left to right for multiplication/division and addition/subtraction.

Simplify the quantities inside the parentheses. Then multiply and distribute the coefficient in front.

$-3\left(\frac{-2-6}{-4}\right)$

$-3\left(\frac{-8}{-4}\right)$

-3(2)=-6

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Example Question #93 : Negative Numbers

Solve:

$\frac{-2(2+2)}{-2(-2-2)}$

Possible Answers:

$-\frac{1}{3}$

$\frac{1}{3}$

Correct answer:

Explanation:

When solving this problem remember our orders of operation, or PEMDAS.

Evaluate the quantities inside the parentheses first.

$\frac{-2(2+2)}{-2(-2-2)}$

$\frac{-2(4)}{-2(-4)}$

$\frac{-8}{8}=-1$

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Example Question #1 : Absolute Value

Solve:

$\left | -6+4\right |\times7=$

Possible Answers:

Correct answer:

Explanation:

$\left | -6+4\right |\times7=\left | -2\right |\times7=2\times7=14$

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Example Question #2 : Absolute Value

Solve:

$\left | 7-3\right |=$

Possible Answers:

Correct answer:

Explanation:

Step 1: solve the problem

$\left | 7-3\right |=\left | 4\right |$

Step 2: solve for absolute value

$\left | 4\right |=4$

Remember, absolute value refers to the total number of units, so it will always be positive. For instance, if I am $4 in debt, I have -$4, but the absolute value of my debt is $4, because that is the total number of dollars that I'm in debt.

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Example Question #3 : Absolute Value

Solve:

$\small \small \left | 3-8 \right | =$

Possible Answers:

$\small 11$

$\small -11$

$\small -5$

$\small 5$

Correct answer:

$\small 5$

Explanation:

First, solve the equation:

$\small \left | 3-8 \right | = \left | -5 \right |$

Next, account for the absolute value:

$\small \left | -5 \right | = 5$

Therefore, the answer is $\small 5$ .

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Example Question #4 : Absolute Value

Solve the expression below:

$\small \small 19+\left |3*(-6) \right |$

Possible Answers:

$\small 36$

$\small -1$

$\small 72$

$\small 37$

$\small 1$

Correct answer:

$\small 37$

Explanation:

$\small \small \small 19+\left |3*(-6) \right |$ simplifies to $\small \small \small \small 19+\left |-18 \right |$

For absolute value expressions, the value within the bars is treated as positive

So, the expression becomes $\small 19+18$ which adds to $\small 37$

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Pre-Algebra : Operations

Study concepts, example questions & explanations for Pre-Algebra

All Pre-Algebra Resources

Example Questions

Example Question #3 : Add And Subtract Rational Numbers: Ccss.Math.Content.7.Ns.A.1d

Example Question #92 : Negative Numbers

Example Question #1 : Divide Integers: Ccss.Math.Content.7.Ns.A.2b

Example Question #8 : Divide Integers: Ccss.Math.Content.7.Ns.A.2b

Example Question #311 : Operations

Example Question #93 : Negative Numbers

Example Question #1 : Absolute Value

Example Question #2 : Absolute Value

Example Question #3 : Absolute Value

Example Question #4 : Absolute Value

All Pre-Algebra Resources

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