Round answers to a set number of decimals
Change the display so every answer shows, say, 2 decimal places.
Display settings only change what you see, not the number the calculator remembers. Fixing the display to 2 decimals shows 2/3 as 0.67 while the calculator still holds many more digits.
Classic Graphing 84
Start on the main screen: Press 2nd then mode (QUIT) to get back to the home screen. Pressing clear on a menu also backs out of it.
Press mode. Move down to the FLOAT row, move right to the number 2 and press enter to select it.
mode▼▶▶▶enterPress 2nd then mode to quit, then work out 2 ÷ 3.
2ndQUITmode2÷3enter
You should see2/3 .67
Go back to FLOAT on the same row to see all digits again.
Natural Scientific 991
Start on the main screen: Press MENU, then 1 (Calculate) to return to the main calculation screen. AC clears the line you are on.
Press SHIFT then MENU (SETUP). Choose 3 for Number Format, 1 for Fix, then 2 for two decimals.
SHIFTSETUPMENU312Clear the screen, then work out 2 ÷ 3 and press S⇔D to switch the answer to a decimal.
AC2÷3=S⇔D
You should see2÷3 0.67
RPN Scientific 15
Start on the main screen: There is no menu to leave. Press the back arrow to clear a number you are typing, or CLx (g then back arrow) to clear the X register.
Press f then FIX (on the 7 key) and then 2 for two decimals.
fFIX72Key in 2 ENTER 3 and press ÷.
2ENTER3÷
You should see0.67
Tips
- Do not round in the middle of a multi-step problem. Round only the final answer to avoid growing errors.