Round off :
54.863 , correct to 1 decimal place.

Answer

To round off the number 54.863 to one decimal place, follow these steps:

### Step 1: Identify the digits
- The number is 54.863.
- The integer part is 54.
- The fractional part is 863.

### Step 2: Locate the first decimal place
- The first digit after the decimal point is 8 (from 54.863).

### Step 3: Look at the second decimal place
- The second digit after the decimal point is 6 (from 54.863).

### Step 4: Apply rounding rules
- Since the second decimal place (6) is greater than 5, we will round up the first decimal place (8).
- To round up, we add 1 to the first decimal place.

### Step 5: Calculate the new value
- Adding 1 to 8 gives us 9.

### Step 6: Write the final rounded number
- Therefore, 54.863 rounded to one decimal place is 54.9.

### Final Answer:
54.9

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