−86.4 + 16.38.

Question

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 \(-70.02\).