Page B-1
Appendix B
The calculator’s keyboard
The figure below shows a diagram of the calculator’s keyboard with the
numbering of its rows and columns.
The figure shows 10 rows of keys combined with 3, 5, or 6 columns. Row 1
has 6 keys, rows 2 and 3 have 3 keys each, and rows 4 through 10 have 5
keys each. There are 4 arrow keys located on the right-hand side of the
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