Pre-Algebra : Negative Numbers

Study concepts, example questions & explanations for Pre-Algebra

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Example Questions

Example Question #51 : Negative Numbers

Possible Answers:

Correct answer:

Explanation:

Since  is greater than  and is positive, our answer is positive.

We treat as a normal subtraction.

.

Another way to look at this problem is looking at the number line and starting from negative nine move to the right twelve spaces.

 

Answer is .

Example Question #41 : The Number System

Possible Answers:

Correct answer:

Explanation:

When adding two negative numbers, we treat as an addition problem and add the minus sign in the end.

 

Add the ones digits together:

Add the tens digits together:

Combine the ones and tens digit to get final answer.

Answer is .

Example Question #1 : Subtract Rational Numbers And Understand The Absolute Value Of Their Difference: Ccss.Math.Content.7.Ns.A.1c

Possible Answers:

Correct answer:

Explanation:

Two minus signs become a plus sign. It's now an addition problem.

Add the ones digits together: 

Add the tens digits together: 

Combine the ones and tens digit to get final answer.

Answer is .

Example Question #1 : Subtract Rational Numbers And Understand The Absolute Value Of Their Difference: Ccss.Math.Content.7.Ns.A.1c

Possible Answers:

Correct answer:

Explanation:

Two minus signs become a plus sign. It's now an addition problem. Since  is greater than  and is negative, our answer is negative.

We treat as a normal subtraction.

Answer is 

Example Question #53 : Negative Numbers

Possible Answers:

Correct answer:

Explanation:

When adding two negative numbers, we treat as an addition problem and add the minus sign in the end.

Another way to look at this problem is to start at negative seven on a number line and move to the left three places.

Answer is .

Example Question #5 : Interpret Products Of Rational Numbers And Understand Properites Of Operations: Ccss.Math.Content.7.Ns.A.2a

Possible Answers:

Correct answer:

Explanation:

When multiplying a negative number and a positive number, our answer is negative.

Multiply normally.

Answer is .

Example Question #51 : Negative Numbers

Possible Answers:

Correct answer:

Explanation:

When multiplying two negative numbers, our answer is positive.

Multiply normally. First multiply two by eight. Then multiply four and one.

         

Next, place a zero in the ones digit spot and multiply one by two followed by multiplying one by one.

         

       

From here, add the two products together.

Answer is .

Example Question #52 : Negative Numbers

Possible Answers:

Correct answer:

Explanation:

We count the number of negative numbers. Any odd amount of negative numbers, our answer will be negative. Three is odd so our answer is negative. We work from left to right.

Now our expression becomes

Answer is .

Example Question #3 : Divide Integers: Ccss.Math.Content.7.Ns.A.2b

Possible Answers:

Correct answer:

Explanation:

When dividing a negative number and a positive number, our answer is negative. Divide normally.

Answer is .

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

Possible Answers:

Correct answer:

Explanation:

When dividing two negative numbers, our answer is positive. Divide normally.

Answer is .

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