Simplify `1856+3287+8432+9.999+18.888`

Options

A. `10453.887`
B. `10435.887`
C. `16303.788`
D. `13603.887`

Answer

To simplify the expression \( 1856 + 3287 + 8432 + 9.999 + 18.888 \), we will follow these steps:

### Step 1: Write down the numbers clearly.
We have the following numbers to add:
- \( 1856 \)
- \( 3287 \)
- \( 8432 \)
- \( 9.999 \)
- \( 18.888 \)

### Step 2: Add the whole numbers first.
Let's first add the whole numbers:
\[ 1856 + 3287 + 8432 \]

Calculating this step by step:
1. \( 1856 + 3287 = 5143 \)
2. \( 5143 + 8432 = 13575 \)

So, the sum of the whole numbers is \( 13575 \).

### Step 3: Add the decimal numbers.
Now, we will add the decimal numbers:
\[ 9.999 + 18.888 \]

Calculating this:
1. Align the decimal points:
\[ \begin{array}{r} 9.999 \\ + 18.888 \\ \hline \end{array} \]
2. Adding from right to left:
- \( 9 + 8 = 17 \) (write down 7, carry over 1)
- \( 9 + 8 + 1 = 18 \) (write down 8, carry over 1)
- \( 9 + 8 + 1 = 18 \) (write down 8, carry over 1)
- \( 0 + 1 + 1 = 2 \) (write down 2)

So, \( 9.999 + 18.888 = 28.887 \).

### Step 4: Add the results from Step 2 and Step 3.
Now, we add the results from the whole numbers and the decimal numbers:
\[ 13575 + 28.887 \]

Aligning the numbers:
\[ \begin{array}{r} 13575.000 \\ + 28.887 \\ \hline \end{array} \]

Calculating this:
1. From the right:
- \( 0 + 7 = 7 \)
- \( 0 + 8 = 8 \)
- \( 0 + 8 = 8 \)
- \( 5 + 2 = 7 \)
- \( 3 + 0 = 3 \)
- \( 1 + 0 = 1 \)

So, \( 13575 + 28.887 = 13575.887 \).

### Final Result:
Thus, the simplified result of \( 1856 + 3287 + 8432 + 9.999 + 18.888 \) is:
\[ \boxed{13575.887} \]

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