Arithmetic Grade Two

Lesson Thirty-eight: Adding Three Numbers

Here's another example: 

    12
    43
   +29
   ----
Problem without answer

    1
    12
    43
   +29
   ----
     4
Adding the 2, 3 and 9 in the ones column we get 14. We take the 4 from 14 and place it in the ones column of the answer and we carry the 1 above the tens column above the addends.

    1
    12
    43
   +29
   ----
    84
We add up the 1, 1, 4, and 2 in the tens column.

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