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First we need to remember the rule:
Now let's rewrite the exercise in the appropriate form:
Next we will solve the exercise vertically, keeping in mind that the final result will be negative since we are subtracting a smaller number from a larger number:
Remember that the answer must be a negative number, so we will add a minus sign to get:
Solve the following expression:
\( (+8)+(+12)=\text{ ?} \)
The parentheses with signs tell us how to handle each number. means "subtract positive 13.04," which simplifies to just subtracting 13.04.
When you subtract a larger number from a smaller number, the result is always negative. Since 13.04 > 0.76, our answer must be negative.
Yes! When you see , the plus sign doesn't change anything - it's still just 0.76. The key is handling the subtraction sign in front of the second term.
Here's a helpful trick: always subtract the smaller absolute value from the larger one, then make the answer negative if the original larger number was being subtracted. So: 13.04 - 0.76 = 12.28, then add the negative sign.
Add your answer to the second number: ✓. If you get the first number back, your subtraction is correct!
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