Predict the result
Whole-number formulas use place value and the order of operations.
Add 354 and 87.

Set up the model
Align digits by place value.
Begin with the ones column and carry when needed.

Work the example
Four plus seven is eleven, so carry one to the tens column.
The sum is four hundred forty one.

Check the result
Now add 5749 and 2883.
Take eight seconds to think before the answer appears.
[Eight-second silent pause to work; the answer remains hidden.]
The sum is eight thousand six hundred thirty two.

Interpret the result
Each carried one belongs to the next larger place value.