Pre-Algebra : Addition and Subtraction

Study concepts, example questions & explanations for Pre-Algebra

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Example Questions

Example Question #41 : Addition And Subtraction

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Correct answer:

Explanation:

These are simply positive numbers. We subtract normally. Answer is .

Example Question #42 : Addition And Subtraction

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Explanation:

Two minus signs become a plus sign. This is an addition problem. Answer is .

Example Question #43 : Addition And Subtraction

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Explanation:

Since  is greater than  and is negative, our answer is negative. This is just a subtraction problem. Answer is .

Example Question #44 : Addition And Subtraction

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Explanation:

Since  is greater than  and is positive, our answer is positive. This is just a subtraction problem. Answer is .

Example Question #45 : Addition And Subtraction

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Correct answer:

Explanation:

Two minus signs become a plus sign. Since  is greater than  and is positive, our answer is positive. This is just a subtraction problem. Answer is .

Example Question #46 : Addition And Subtraction

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Explanation:

With two negative numbers, it's the same as adding them. We just add the numbers and then add the minus sign in the end. Answer is .

Example Question #47 : Addition And Subtraction

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Explanation:

All the numbers our positive. We add normally by adding the ones digit first followed by the tens digit. Our answer is .

Example Question #48 : Addition And Subtraction

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Explanation:

When a plus and minus sign meet, the operation becomes minus sign. We subtract normally. Answer is .

Example Question #49 : Addition And Subtraction

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Explanation:

Since  is greater than  and is positive, our answer is positive. We treat as a subtraction problem. Answer is .

Example Question #50 : Addition And Subtraction

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Correct answer:

Explanation:

We just subtract normally. Answer is .

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