MS Excel
We can save and protect the workbook by

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

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MS Excel
To create a formula, you can use:

Value and cell references
Cell references but not values
Values or cell references although not both at the same time
Values but not cell references

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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
Because excel uses hidden decimal places in computation
When you use multiplication, division, or exponentiation in a formula
When you use addition and subtraction in a formula

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