Pre-Algebra : Addition and Subtraction

Study concepts, example questions & explanations for Pre-Algebra

varsity tutors app store varsity tutors android store

Example Questions

Example Question #21 : Addition And Subtraction

Possible Answers:

Correct answer:

Explanation:

Just add the number normally. The answer is .

Example Question #22 : Addition And Subtraction

Possible Answers:

Correct answer:

Explanation:

When a plus and minus sign meet, the sign becomes negative. Subtract normally. Answer is .

Example Question #23 : Addition And Subtraction

Possible Answers:

Correct answer:

Explanation:

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

Possible Answers:

Correct answer:

Explanation:

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

Possible Answers:

Correct answer:

Explanation:

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

Possible Answers:

Correct answer:

Explanation:

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

Possible Answers:

Correct answer:

Explanation:

Just subtract normally. Answer is .

Example Question #28 : Addition And Subtraction

Possible Answers:

Correct answer:

Explanation:

When two minus signs meet, the sign becomes positive. It becomes an addition problem. Answer is .

Example Question #29 : Addition And Subtraction

Possible Answers:

Correct answer:

Explanation:

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

Possible Answers:

Correct answer:

Explanation:

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 .

Learning Tools by Varsity Tutors