What must be subtracted from `45.56` to get `28.6794` ?

Options

A. `16.8296`
B. `16.8806`
C. `16.886`
D. `16.8116`

Answer

To find out what must be subtracted from `45.56` to get `28.6794`, we can follow these steps:

### Step 1: Set up the equation
Let \( x \) be the number that must be subtracted from \( 45.56 \). According to the problem, we can write the equation as:
\[ 45.56 - x = 28.6794 \]

### Step 2: Rearrange the equation
To find \( x \), we can rearrange the equation. We will add \( x \) to both sides and subtract \( 28.6794 \) from both sides:
\[ 45.56 - 28.6794 = x \]

### Step 3: Perform the subtraction
Now we will calculate \( 45.56 - 28.6794 \):
1. Align the numbers by their decimal points:
```
45.5600
- 28.6794
```

2. Start subtracting from the rightmost digit:
- In the thousandths place: \( 0 - 4 \) (we need to borrow)
- In the hundredths place: \( 0 - 9 \) (we need to borrow)
- In the tenths place: \( 5 - 7 \) (we need to borrow)
- In the units place: \( 5 - 8 \) (we need to borrow)
- In the tens place: \( 4 - 2 \)

After borrowing and performing the subtraction, we get:
\[ 45.56 - 28.6794 = 16.8806 \]

### Step 4: Write the final answer
Thus, the number that must be subtracted from \( 45.56 \) to get \( 28.6794 \) is:
\[ x = 16.8806 \]

### Final Answer:
**16.8806 must be subtracted from 45.56 to get 28.6794.**

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