Complete the Addition Sentence - Within 1000

Consider the addition sentence:

? + 146 = 469

Let's find the missing number. 

To find the missing number, we should subtract 146 from 469.

  4 6 9
–
 1 4 6
       


Subtract ones.

  4 6 9
–
 1 4 6
      3


Subtract tens.

  4 6 9
–
 1 4 6
    2 3


Subtract hundreds.

  4 6 9
–
 1 4 6
  3 2 3


So, the missing addend is 323.