基本上，主题说明了一切。查看帮助并没有帮助（讽刺的是），因为它只显示了一些计算器：常见问题解答。
答案1
奇怪的是这不在帮助文件中，你是对的。http://windows.microsoft.com/en-US/windows7/Keyboard-shortcuts有非常详尽的计算器（以及其他东西）的快捷方式列表。
Alt+1 Switch to Standard mode
Alt+2 Switch to Scientific mode
Alt+3 Switch to Programmer mode
Alt+4 Switch to Statistics mode
Ctrl+E Open date calculations
Ctrl+H Turn calculation history on or off
Ctrl+U Open unit conversion
Alt+C Calculate or solve date calculations and worksheets
F1 Open Calculator Help
Ctrl+Q Press the M- button
Ctrl+P Press the M+ button
Ctrl+M Press the MS button
Ctrl+R Press the MR button
Ctrl+L Press the MC button
% Press the % button
F9 Press the +/– button
/ Press the / button
* Press the * button
+ Press the + button
- Press the – button
R Press the 1/× button
@ Press the square root button
0-9 Press the number buttons (0-9)
= Press the = button
. Press the . (decimal point) button
Backspace Press the backspace button
Esc Press the C button
Del Press the CE button
Ctrl+Shift+D Clear the calculation history
F2 Edit the calculation history
Up Arrow key Navigate up in the calculation history
Down Arrow key Navigate down in the calculation history
Esc Cancel editing the calculation history
Enter Recalculate the calculation history after editing
F3 Select Degrees in Scientific mode
F4 Select Radians in Scientific mode
F5 Select Grads in Scientific mode
I Press the Inv button in Scientific mode
D Press the Mod button in Scientific mode
Ctrl+S Press the sinh button in Scientific mode
Ctrl+O Press the cosh button in Scientific mode
Ctrl+T Press the tanh button in Scientific mode
( Press the ( button in Scientific mode
) Press the ) button in Scientific mode
N Press the ln button in Scientific mode
; Press the Int button in Scientific mode
S Press the sin button in Scientific mode
O Press the cos button in Scientific mode
T Press the tan button in Scientific mode
M Press the dms button in Scientific mode
P Press the pi button in Scientific mode
V Press the F-E button in Scientific mode
X Press the Exp button in Scientific mode
Q Press the x^2 button in Scientific mode
Y Press the x^y button in Scientific mode
# Press the x^3 button in Scientific mode
L Press the log button in Scientific mode
! Press the n! button in Scientific mode
Ctrl+Y Press the y√x button in Scientific mode
Ctrl+B Press the 3√x button in Scientific mode
Ctrl+G Press the 10x button in Scientific mode
F5 Select Hex in Programmer mode
F6 Select Dec in Programmer mode
F7 Select Oct in Programmer mode
F8 Select Bin in Programmer mode
F12 Select Qword in Programmer mode
F2 Select Dword in Programmer mode
F3 Select Word in Programmer mode
F4 Select Byte in Programmer mode
K Press the RoR button in Programmer mode
J Press the RoL button in Programmer mode
< Press the Lsh button in Programmer mode
> Press the Rsh button in Programmer mode
% Press the Mod button in Programmer mode
( Press the ( button in Programmer mode
) Press the ) button in Programmer mode
| Press the Or button in Programmer mode
^ Press the Xor button in Programmer mode
~ Press the Not button in Programmer mode
& Press the And button in Programmer mode
A-F Press the A-F buttons in Programmer mode
Spacebar Toggles the bit value in Programmer mode
A Press the Average button in Statistics mode
Ctrl+A Press the Average Sq button in Statistics mode
S Press the Sum button in Statistics mode
Ctrl+S Press the Sum Sq button in Statistics mode
T Press the S.D. button in Statistics mode
Ctrl+T Press the Inv S.D. button in Statistics mode
D Press the CAD button in Statistics mode