Addition and Subtraction - Pre-Algebra

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 .

When two minus signs meet, the sign becomes positive. Since is greater than and is negative, our answer is negtaive. We treat as a subtraction problem. Answer is .

When two minus signs meet, the sign becomes positive. We have two of the same numbers but with different signs. Answer is .

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:

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 is zero.

This is the hundreds digit of the final answer. There are no carry overs.

Add the thousands digits. The thousands digit for is zero.

This is the thousands digit of the final answer. Combine all numbers.

The answer is:

A plus and minus sign becomes a minus sign. Since is greater than and is negative, our answer is negative. This is just a subtraction problem. Answer is .

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

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

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 .

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

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

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

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 .

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 .

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

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

We just subtract normally. Answer is .

When two minus signs meet, it becomes a plus sign. We add normally. Answer is .

When we have two negative numbers present, we treat as an addition problem but add a minus sign in the end. Answer is .