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It depends on the calculator. The Casios have two = signs. The main one tells the calculator to evaluate the expression entered. It is at the bottom of the face of the calculator. There is a second key that helps you enter the = sign without executing the command. To type in that = sign, you press the ALPHA key followed by the CALC key. The = sign is entred. Usually that sign is used when you want to enter an equation to be solved.
What I said above to some Casio calculators. However your question is under the Texas Instruments Calculators heading, and I have no idea which TI calculator you have in mind,
Look at the top left corner of the keypad. If you have a = sign marked on the f ace of the calculator (near a CALc or Solve key) you can enter the = by pressing [ALPHA] then the key next to which there is an = sign. If you do not have that second = sign, you cannot enter it. The FX-115ES and the FX-991ES do have that sign to allow the user to enter equations. In your calculator you only have three calculational modes: the general COMP mode, the STAT mode and the Table Mode. No equation mode. Sorry.
Hello, The calculator will stop screaming out SYNTAX ERROR, when you stop ordering it to do things the wrong way. Take a look at the manual. For certain calculations you enter the number first and then press the function key. For others, you press the function key then the number. If an expression contains a left parenthesis, it must also have a closing right parenthesis. It you want to enter negative 5, you use the change sign (-) not the regular MINUS sign. These are exemples of instances where you get a syntax error. For every new type of calculation you have to perform, read the exemple in the manual to find out which must be entered first: the number or the function. Hope it helps.
You can probably just reset the unit to get it back to normal...
2nd>mem(+ sign)>reset>[ram](it's a menu)> Yes.
If that doesn't work you can do a full reset which will erase all applications on the calculator, but you can just reload them from your pc (not like it takes very long) 2nd>mem(+sign)>reset>right 2x(should say "ALL" at top)>Yes
This will reset the calculator to it's default behaviors
I found this and it seems to work
Solution #2posted on Nov 17, 2006
Rating: 94.81%, 27 votes
on the bottom of your calculator is a reset button, with a paperclip or a pen press that button.
Then, press the calendar, clock key.
next, press the equal sign key until the date is flashing
type in the date using 11172006.
press the equal sign again and the date is set.
Next press the calendar, clock key again the time should show up (12-00-00)press the equal sign again until the time starts to flash. enter in the time using 0903 (9:03) press the equal sign again. Time is set.
to display the date and time when not using the calculator, press the calculator, clock key 2x's.
to go to compute mode press the red CE/C button.