Evaluate:
`542.22 - 56.3 - 6.77 `

Answer

To solve the expression \( 542.22 - 56.3 - 6.77 \), we will follow these steps:

### Step 1: Subtract the first two numbers
We start by subtracting \( 56.3 \) from \( 542.22 \).

1. Align the numbers by their decimal points:
```
542.22
- 56.30
```

2. Now, perform the subtraction:
- Start from the rightmost digit:
- \( 2 - 0 = 2 \)
- \( 2 - 3 \): Since we cannot subtract 3 from 2, we need to borrow 1 from the next column (the 4 becomes 3, and the 2 becomes 12):
- \( 12 - 3 = 9 \)
- \( 3 - 6 \): Again, we need to borrow 1 from the next column (the 5 becomes 4, and the 3 becomes 13):
- \( 13 - 6 = 7 \)
- \( 4 - 5 \): We need to borrow again (the 5 becomes 4, and the 4 becomes 14):
- \( 14 - 5 = 9 \)

3. Putting it all together, we get:
```
542.22
- 56.30
---------
485.92
```

### Step 2: Subtract the result from the third number
Now we will subtract \( 6.77 \) from \( 485.92 \).

1. Align the numbers by their decimal points:
```
485.92
- 6.77
```

2. Perform the subtraction:
- Start from the rightmost digit:
- \( 2 - 7 \): We need to borrow (the 9 becomes 8, and the 2 becomes 12):
- \( 12 - 7 = 5 \)
- \( 8 - 7 = 1 \)
- \( 5 - 6 \): We need to borrow (the 4 becomes 3, and the 5 becomes 15):
- \( 15 - 6 = 9 \)
- \( 3 - 0 = 3 \)

3. Putting it all together, we get:
```
485.92
- 6.77
---------
479.15
```

### Final Answer
The result of \( 542.22 - 56.3 - 6.77 \) is \( 479.15 \).

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