Complete the Addition Sentence up to Three Digits (Within 1000)

Consider the addition sentence:

? + 432 = 667

Let's find the missing addend in this addition sentence.

To find the missing number, we need to subtract 432 from 667.

  6 6 7
–
 4 3 2
       


Subtract ones.

  6 6 7
–
 4 3 2
      5


Subtract tens.

  6 6 7
–
 4 3 2
    3 5


Subtract hundreds.

  6 6 7
–
 4 3 2
  2 3 5


So, the missing addend is 235.