Round each number to the nearest hundredth. What is the best estimate for the sum of 23.638 + 74.827? A. 98.45 B. 98.46 C. 98.47 D. 98.48

If the number you are rounding is followed by 5, 6, 7, 8, or 9, round the number up (+1).

If the number you are rounding is followed by 0, 1, 2, 3, or 4, round the number down (no change).

23.638 ≈ 23.64

74.827 ≈ 74.83

therefore:

23.638 + 74.827 ≈ 23.64 + 74.83 = 98.47 ⇒ answer C