MS Excel
We can save and protect the workbook by

Write Reservation Password
Protection Password
Read-only Recommended
Any of the above

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MS Excel
Rounding errors can occur

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

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MS Excel
How do you insert a row?

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

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MS Excel
You can move a sheet from one workbook into new book by

From Edit menu choose Move or Copy sheet, mark the Create a ccopy and Click OK
From Edit menu choose Move of Copy then choose (Move to end) and click OK
From Edit menu choose Move or Copy then select (new book) from To Book list and click OK
None of the listed here

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