Multiple choice What is the value of the missing digit? 4 _ 9 + 128 = 617 6 8 7 9 Reveal answer Fill a bubble to check yourself B Correct answer Explanation 4 _ 9 + 128 = 617 9 + 8 = 17 2 + 1 (carried) + 8 = 11 So, the missing digit is 8.