Is the battery necessary? Will it work without the battery?

We removed the battery and the calculator did not work.

how do you turn the calculator off?

If the calculator isn’t used it turns itself off

How do you turn it off? It has an on button, but I can’t turn it off.

There is no 'off" button. Just leave it alone and in a few minutes it will automatically turn off

What does a negative number look like on the display? Is it a negative sign before the number or does it say "minus?"

There's a minus symbol on the left side and the number on the right.

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Manufacturer	AmazonBasics
Brand	amazon basics
Model Number	KC-760-8/5-pk
Colour	Black
Manufacturer Part Number	F-760L-8---A34-01-01
Manufacturer	AmazonBasics

AmazonBasics LCD 8-Digit Desktop Calculator, Black - 5 Pack

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