All Pre-Algebra Resources
Example Questions
Example Question #15 : Addition And Subtraction
Add:
Simplify the parentheses.
A positive and a negative sign will result in a negative sign.
When all numbers are negative that are being added, simply add the integers and then place the negative sign in front of the final answer.
Example Question #18 : Addition And Subtraction
Add .
Add the ones digit.
Since this number is 10 or greater, we must carry over the tens digit to the next calculation.
Add the tens digit with the carry over.
There is no carry over.
Add the hundreds digits. The hundreds digit for is zero.
Combine all ones digits.
The answer is .
Example Question #141 : Operations
Just add the number normally. The answer is .
Example Question #142 : Operations
When a plus and minus sign meet, the sign becomes negative. Subtract normally. Answer is .
Example Question #151 : Operations
When a plus and minus sign meet, the sign becomes negative. Since is greater than and is negative, our answer is negative. We treat as a subtraction problem. Answer is .
Example Question #152 : Operations
When a plus and minus sign meet, the sign becomes negative. Since is greater than and is negative, our answer is negative. We treat as a subtraction problem. Answer is .
Example Question #153 : Operations
When a plus and minus sign meet, the sign becomes negative. Since is greater than and is positive, our answer is positive. We treat as a subtraction problem. Answer is .
Example Question #154 : Operations
When a plus and minus sign meet, the sign becomes negative. When adding two negative numbers, we treat as an addition problem and add a minus sign in the end. Answer is .
Example Question #155 : Operations
Just subtract normally. Answer is .
Example Question #156 : Operations
When two minus signs meet, the sign becomes positive. It becomes an addition problem. Answer is .