Because they give the same result, you can see that subtracting eight from five is equivalent to adding negative eight to positive five. The answer is - 3. Because they give the same result, you can see that subtracting negative six from negative three is equivalent to adding positive six to negative three.
The answer is 3. All rights reserved. Please read our Privacy Policy. Also, these integers have different signs, so keep the sign from the integer having the greatest absolute value and subtract the smallest absolute value from the largest. Homework Help Pre-Algebra Numbers. Tired of ads? Join today and never see them again. Get started. Start at —3. Jump 2 places in the negative direction. You land on the answer, —5. Start at —4. What is the sign of the sum? If you moved further to the right than you did to the left, you ended to the right of 0, and the answer is positive; and if you move further to the left, the answer is negative.
Look at the illustration below. To add two numbers with different signs one positive and one negative :. Note that when you find the difference of the absolute values, you always subtract the lesser absolute value from the greater one. The example below shows you how to solve the temperature question that you considered earlier.
The addends have different signs. So find the difference of their absolute values. With more than two addends, you can add the first two, then the next one, and so on. Since they have the same signs, you add their absolute values and use the same sign.
You found the sum of the absolute values. Since the addends have different signs, you must find the difference of the absolute values. The sign of the sum is the same as the addend with the greater absolute value. The correct answer is Refer to the number line to help you visualize the process in each example.
We will use money as an alternative method for adding integers. Look at the problems below. Do you see a pattern? Summary: Adding two positive integers always yields a positive sum; adding two negative integers always yields a negative sum. To find the sum of a positive and a negative integer, take the absolute value of each integer and then subtract these values.
The result takes the sign of the integer with the larger absolute value. The sum of any integer and its opposite is equal to zero. Directions: Read each question below. By signing up, you agree to receive useful information and to our privacy policy. Shop Math Games. Skip to main content.
0コメント