Question

The sum of 23.8 and a number is 28.17, as shown below. What number should go in the box to complete the addition problem?

23.8 + _____ = 28.17

a) 4.37
b) 5.37
c) 4.79
d) 3.99

Answer 1

The missing number that completes the addition problem is 4.37 (option a).

Step-by-step explanation:

To find the missing number in the addition problem, we can subtract 23.8 from both sides of the equation:

28.17 - 23.8 = _____

4.37 + 23.8 = 28.17

So the missing number that completes the addition problem is 4.37 (option a).