Estimate each difference to the nearest hundred : `(678-215)`

Answer

To estimate the difference between 678 and 215 to the nearest hundred, we will follow these steps:

### Step 1: Round 678 to the nearest hundred.
- Look at the tens place of 678, which is 7.
- Since 7 is greater than 5, we round up.
- This means we add 1 to the hundreds place (6) and change the tens and units places to 0.
- Therefore, 678 rounds to **700**.

### Step 2: Round 215 to the nearest hundred.
- Look at the tens place of 215, which is 1.
- Since 1 is less than 5, we do not round up.
- This means we keep the hundreds place (2) the same and change the tens and units places to 0.
- Therefore, 215 rounds to **200**.

### Step 3: Calculate the estimated difference.
- Now we subtract the rounded values:
- 700 - 200 = 500.

### Final Answer:
The estimated difference of 678 - 215 to the nearest hundred is **500**.

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