# Excel spreadsheet help (formulas)

Asked by

gasman (

11248
)
September 12th, 2011

I’ve worked with MS Office Excel spreadsheets before. I understand referencing other cells in a formula, specifying a range of cells, and using functions like SUM(ABOVE) OR SUM(LEFT). But I’m stumped on how to implement a couple of seemingly simple situations:

(1) Make a table where the first column consists of positive numbers and the second column is their square roots. Each cell in the 2nd column needs a formula that says, “Take the square root of the value in the cell to your left.” How would you write the formula? Do you have to enter a different formula for each row?

(2) Make a multiplication table for the integers 1–9 (like in 3rd grade) where the top row and leftmost column each contain values 1 through 9. Cell i9 would contain the number 81. How do you write a formula that says, “Take the first number in this row (i.e., the value of the first cell) & multiply by the first number in this column?”

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## 7 Answers

Which version of excel are you using? In 2010 it has a square root function which is =sqrt(*CellNameHere*). Also as far as the second problem with the multiplication table can you not just use the cell name for example =$B$1*A2 and then drag it down?

In column A:A you’ll have a series of values.

1)

The formula in B1 is: =sqrt( A1)

Select and copy that cell down the full column (as far down as you have values in A:A), and the formula for B2 will show: =sqrt( A2) and so on.

2)

Set A2:A10 as values 1 – 9

Set B1:J1 as values 1 – 9

At B2 the formula is (exactly this): =B$1 * $A2

Copy that cell

Select cells B2:J10 and paste the copied formula. (The ending formula at J10 will be: =J$1 * $A10)

I hope this wasn’t homework in Excel.

tutorial

Check out that website for a tutorial on autofilling a formula

@CWOTUS and @abysmalbeauty: The automatic fill feature seems to be the answer I’m looking for. Who knew? Thanks a million.

Homework? Ha! Not since Nixon was president…

That’s a great tutorial, @abysmalbeauty. Cuts through the usual b.s.

Happy to help :)

again dependent on what version of excel you are using however if you are using a newer version, **double clicking** on the teeny tiny square at the bottom of the cell that is used to auto fill will automatically drag it down to the bottom of your table for you.

Actually I just installed the latest Office for Mac (previously used Office 2003 for Windows). This feature might have been there all along, but I didn’t know about it until I “tapped the collective” yesterday.

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