Compute 27.5 + (-2.4) and 4.5 - 29.26.
Understand the Problem
The question is asking to compute the results of two mathematical expressions: adding 27.5 and -2.4, and subtracting 29.26 from 4.5. The goal is to find the answers for these computations.
Answer
$27.5 + (-2.4) = 25.1$; $4.5 - 29.26 = -24.76$
Answer for screen readers
$27.5 + (-2.4) = 25.1$
$4.5 - 29.26 = -24.76$
Steps to Solve
- Addition of Numbers
We will first compute the sum of $27.5$ and $-2.4$.
This can be approached as:
$$ 27.5 + (-2.4) = 27.5 - 2.4 $$
Now, we'll perform the subtraction:
$$ 27.5 - 2.4 = 25.1 $$
- Subtraction of Numbers
Next, we will subtract $29.26$ from $4.5$.
This can be represented as:
$$ 4.5 - 29.26 $$
Since $4.5$ is less than $29.26$, the result will be negative:
$$ 4.5 - 29.26 = -24.76 $$
$27.5 + (-2.4) = 25.1$
$4.5 - 29.26 = -24.76$
More Information
The process of adding a negative number is equivalent to subtraction, which is why $27.5 + (-2.4)$ is calculated as $27.5 - 2.4$. Subtracting a larger number from a smaller one leads to a negative result.
Tips
- Mistaking $-2.4$ as adding instead of recognizing it as subtraction can lead to incorrect results.
- Forgetting to borrow when dealing with decimals in subtraction can also lead to errors.
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