HP 10BII Owner's Manual page 24

When a calculation has been completed (by pressing ©), pressing a
number key starts a new calculation.
СООО 240.92 Calculates 19 X 12.68.
If you press an operator key after completing a calculation, the
calculation is continued.
COCOS 356.42 Completes calculation
of 240.92 + 115.5.
You can do chain calculations without using © after each step.
(@С)@ SCOGX96 36.92 Pressing © displays
intermediate result
(6.9 х 5.35).
@@@® 40.57 Completes calculation.
Chain calculations are interpreted in the order in which they are entered.
Calculate 4 + 9 x 3.
@8@@ 13.00 Adds 4 + 9.
GG 39.00 Mulriplies 13 X 3.
Negative Numbers. Enter the number and press @ to change the sign.
Calculate -75 + 3.
Keys: Display: Description:
DOB -75_ Changes the sign of 75.
(®@©®
-25.00
Calculates result.
24 1: Getting Started