Pre-Algebra : Operations and Properties
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Example Questions
Example Question #7 : Subtract Rational Numbers And Understand The Absolute Value Of Their Difference: Ccss.Math.Content.7.Ns.A.1c
Two minus signs become a plus sign. It's now an addition problem. Since 
We treat as a normal subtraction.
Answer is
Example Question #11 : Understand Distances Between Numbers On A Number Line: Ccss.Math.Content.7.Ns.A.1b
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
When multiplying a negative number and a positive number, our answer is negative.
Multiply normally.
Answer is 
Example Question #6 : Interpret Products Of Rational Numbers And Understand Properites Of Operations: Ccss.Math.Content.7.Ns.A.2a
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 #273 : Operations
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
When dividing a negative number and a positive number, our answer is negative. Divide normally.
Answer is 
Example Question #4 : Divide Integers: Ccss.Math.Content.7.Ns.A.2b
When dividing two negative numbers, our answer is positive. Divide normally.
Answer is 
Example Question #274 : Operations
We count the number of negative numbers. Any odd amount of negative numbers, our answer will be negative. Two is even so our answer is positive. Work from left to right.
Dividing the first two terms,
now the expression becomes
Answer is 
Example Question #275 : Operations
When subtracting negative numbers, the two negative signs transform into an addition sign. Rewrite the question as follows to solve:
To make the next step even easier, you may switch the position of each number in the sequence (only apply this to addition and subtraction problems):
As you can see, rewriting the question this way will alert you that the answer should be negative (since you are subtracting a bigger number from a smaller number). One last step to make solving this question even easier is to rewrite the question like this:
Example Question #271 : Operations
Solve:
When a plus and minus sign meet, we have a minus sign. Since 
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