Texas Instruments TI-73 Software Manual page 15

The examples below show the standard fast algorithm.
Addition
Subtraction
TI-73 / TI-83 Plus Math by Hand Application
No partial sums are shown in the standard algorithm.
Notice that the 1 is carried to the tens place above the 3.
Subtraction in Fast Math mode is similar to subtraction
in Step-by-Step mode. No text is displayed on the
screen to explain the steps.
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