Answer:
450,000
Explanation:
To estimate the answer by rounding 863 x 534 to the nearest 100, follow these steps:
1. Multiply the tens digit of both numbers: 8 x 5 = 40
2. Round each number to the nearest 100: 863 ≈ 900 and 534 ≈ 500
3. Multiply the rounded numbers: 900 x 500 = 450,000
4. The estimated answer to the nearest 100 is 450,000.
Therefore, when rounding 863 x 534 to the nearest 100, the estimated answer is 450,000.