Pre-Algebra : Addition and Subtraction
Study concepts, example questions & explanations for Pre-Algebra
All Pre-Algebra Resources
Example Questions
Example Question #159 : Operations And Properties
When two minus signs meet, the sign becomes positive. Since 
Example Question #160 : Operations And Properties
When two minus signs meet, the sign becomes positive. We have two of the same numbers but with different signs. Answer is 
Example Question #33 : Addition And Subtraction
Add:
Add the ones digits.
Add the tens digits.
Add the hundreds digits. The hundreds digit for the second number is zero.
There are no carry overs in this question.
Combine all the numbers for the final answer.
The answer is:
Example Question #34 : Addition And Subtraction
Add:
Add the ones digits.
Since this number is ten or greater, the tens digit is the carry over for the next calculation.
The zero is the ones digit of the final answer.
Add the tens digits with the carry over.
This value is also ten or greater, so the tens digit is the carryover. The six is the tens digit of the final answer.
Add the hundreds digit with the carryover. The hundreds digit for 
This is the hundreds digit of the final answer. There are no carry overs.
Add the thousands digits. The thousands digit for 
This is the thousands digit of the final answer. Combine all numbers.
The answer is:
Example Question #161 : Operations And Properties
Solve:
The numbers are positive. Just add. The sum is 
Example Question #162 : Operations And Properties
Solve:
A plus and minus sign becomes a minus sign. This is just a subtraction problem. Answer is 
Example Question #37 : Addition And Subtraction
Solve:
A plus and minus sign becomes a minus sign. Since 
Example Question #163 : Operations And Properties
Solve:
Since 
Example Question #164 : Operations And Properties
Solve:
Since 
Example Question #165 : Operations And Properties
Solve:
A plus and a minus sign becomes a minus sign. Then we just add the numbers and add the minus sign in the end. Answer is 
All Pre-Algebra Resources
