-4 - (-7) = 6 - (-9) =
Understand the Problem
The question is asking to perform subtraction involving negative numbers. We need to simplify the expressions by applying the rules of subtraction and handling negatives correctly.
Answer
- For the first expression: $3$ - For the second expression: $15$
Answer for screen readers
The final results are:
- For the first expression: $-4 - (-7) = 3$
- For the second expression: $6 - (-9) = 15$
Steps to Solve
-
Understanding Subtraction of Negative Numbers
When you subtract a negative number, it is equivalent to adding the absolute value of that number. Thus, we can rewrite the expressions. -
Simplifying the First Expression
For the first expression, we have: $$ -4 - (-7) = -4 + 7 $$ Now, perform the addition: $$ -4 + 7 = 3 $$ -
Simplifying the Second Expression
For the second expression, we can rewrite it as: $$ 6 - (-9) = 6 + 9 $$ Now, perform the addition: $$ 6 + 9 = 15 $$
The final results are:
- For the first expression: $-4 - (-7) = 3$
- For the second expression: $6 - (-9) = 15$
More Information
When subtracting negative numbers, remember that you are effectively adding a positive number. This rule helps in simplifying many mathematical operations involving negatives.
Tips
- A common mistake is to forget that subtracting a negative turns into addition. Always remember to transform subtraction of a negative into addition.
AI-generated content may contain errors. Please verify critical information
