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Section 6: Functions 90
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Adding and Subtracting Time and Angles
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To add or subtract decimal hours, merely key in the numbers from the decimal
hours and press + or
– . To add hours, minutes,
seconds, use the HMS+ (add hours, minutes,
seconds) or HMS– (subtract hours, minutes,
seconds) function. Both of these functions are executed using
XEQ or by assigning them to a key for execution in
USER mode.
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Likewise, angles specified in degrees, minutes, seconds are added and
subtracted using the HMS+ and
HMS– functions.
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Assign HMS+ and
HMS– to the LOG and
10x keys, respectively, for execution in
USER mode.
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Example: Find the sum of 45 hours, 10 minutes, 50.76 seconds and
24 hours, 49 minutes, 10.95 seconds, then subtract 7 hours, 23 minutes,
11 seconds from that result.
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