MS Excel
You can use the format painter multiple times before you turn it off by

Pressing the Ctrl key and clicking the format painter button
You can use the format painter button on ly one time when you click it
Double clicking the format painter button
Pressing the Alt key and clicking the format painter button

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MS Excel
Which tool you will use to join some cells and place the content at the middle of joined cell?

From Format Cells dialog box select the Centered alignment
From Format Cells dialog box click on Merge Cells check box
Click on Merge and Center tool on formatting toolbar
From Format Cells dialog box choose Merge and Center check box

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MS Excel
Rounding errors can occur

Because excel uses hidden decimal places in computation
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

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