The plus symbol: +
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If you mean Excel, you can add numbers one at a time with the "+" symbol. To add a larger range of cells, you need to use the sum() function. Don't forget that Excel formulae start with the "=" symbol. Example: = sum(a1:b10) As a convenient shortcut, once you type "sum(", you can select the range with the mouse.
You can use the AutoSum facility which can be triggered by clicking on the Greek letter sigma, which looks like a strange capital E like this: Σ
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The plus sign, +, is used to add two numbers together. It is one of the four basic arithmetic operations along with:Subtract, -Multiplication, x or *Division, / or ÷
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