Add With Pencil and Paper
Adding 2Digit Numbers: Learn
How to add twodigit numbers (for example 29 + 33).

Place one number above the other number so that the tens' place digits
and ones' place digits are lined up. Draw a line under the bottom number.
2 9 + 3 3 
Add the ones' place digits (9 + 3 = 12). This sum is a twodigit number,
so place a one above the tens' place column and place the two below the
line in the ones' place column.
1 2 9 + 3 3 2 
Add the tens' place digits (1 + 2 + 3 = 6) and place the answer below
the line in the tens' place column.
1 2 9 + 3 3 6 2
Add with Mental Math: Practice
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