User Manual
Page 70
... equal to "GT" (grand total) "+/-" (sign change) will clear the displayed and memory values. Keys number keys Function basic operators "%" (percent) " "(square root) "MR" (memory recall) "M-" (the value in memory minus the displayed one] "M+" (adds the displayed value to value in memory) "AC" (all clear) will toggle sign of the number...
... equal to "GT" (grand total) "+/-" (sign change) will clear the displayed and memory values. Keys number keys Function basic operators "%" (percent) " "(square root) "MR" (memory recall) "M-" (the value in memory minus the displayed one] "M+" (adds the displayed value to value in memory) "AC" (all clear) will toggle sign of the number...