All Pre-Algebra Resources
Example Questions
Example Question #21 : Addition And Subtraction
Just add the number normally. The answer is .
Example Question #22 : Addition And Subtraction
When a plus and minus sign meet, the sign becomes negative. Subtract normally. Answer is .
Example Question #23 : Addition And Subtraction
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 #24 : Addition And Subtraction
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 #25 : Addition And Subtraction
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 #26 : Addition And Subtraction
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 #27 : Addition And Subtraction
Just subtract normally. Answer is .
Example Question #28 : Addition And Subtraction
When two minus signs meet, the sign becomes positive. It becomes an addition problem. Answer is .
Example Question #29 : Addition And Subtraction
This is the same as adding two negative numbers. We treat as an addition problem and add the minus sign in the end. Answer is .
Example Question #30 : Addition And Subtraction
When two minus signs meet, the sign becomes positive. Since is greater than and is positive, our answer is positive. We treat as a subtraction problem. Answer is .
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