MS Excel
Each excel file is called a workbook because

It can contain text and data
It can contain many sheets including worksheets and chart sheets
It can be modified
You have to work hard to create it

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MS Excel
Rounding errors can occur

When you show the results of formulas with different decimal places that the calculated results
When you use addition and subtraction in a formula
Because excel uses hidden decimal places in computation
When you use multiplication, division, or exponentiation in a formula

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MS Excel
How do you insert a row?

Right-click the row heading where you want to insert the new row and select Insert from the shortcut menu
Select the row heading where you want to insert the new row and select Edit >Row from the menu
Select the row heading where you want to insert the new row and click the Insert Row button on the standard toolbar
All of the listed here

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