Question

−86.4 + 16.38.
Responses
A −70.02−70.02
B −69.64−69.64
C 102.78102.78
D 122.42

Answer 1

To solve the expression \(-86.4 + 16.38\):

1. Start with \(-86.4\).
2. Add \(16.38\) to it.

Calculating:

\[
-86.4 + 16.38 = -70.02
\]

Thus, the correct answer is:

**A** \(-70.02\)

Answer 2

is that correct ??

Answer 3

Let’s verify the calculation again step-by-step:

We start with:

\[
-86.4 + 16.38
\]

1. **Convert -86.4 to a fraction or add directly:**
\[
-86.4 = -86.40
\]

2. **Align the numbers for addition:**
\[
\begin{array}{r}
-86.40 \\
+16.38 \\
\hline
\end{array}
\]

3. **Perform the addition:**
- In the hundredths place: \(0 + 38 = 38\) (carry over \(0\) since \(0\) is less than \(3\))
- In the tenths place: \(4 + 3 = 7\)
- In the units place: \(6 + 6 = 12\), carry over \(1\) (now we have a total of \(8\))
- Finally, in the tens place: \(-8 + 1 = -7\)

Putting it all together:

So the resulting sum is:

\[
-70.02
\]

Therefore, the calculation is indeed correct:

The answer is **A** \(-70.02\).