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Add

"I wonder what methods can be used to add and subtract matrices.

Basically we use two methods. Either are very simple. Namely:

1. With the SUM function

2. Matrix formula

Suppose we start the following example:

We proceed to add the four matrices M1 + M2 + M3 + M4. Using the method known simply we move into the cell F24 and write the formula (we use the discontinuous selection to select those cells)

= SUM (B3, B10, F3, F10)

then copy this formula to cell H24 and then copy it down to cell H28.

We can solve this sum using array formulas. To do this we place ourselves in cell F17 and select the range F17: H21. Write the selected range the formula:

= B3: D7 + B10: D14 + F3: H7 + F10: H14

and finish by pressing (as it is input matrix ) ctrl + shift + enter .

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Align Numbers Matrices Base to Decimal

"I need to align the numbers of different cells based on the decimal places (three in particular ) and not as the default has excel Is Possible? "

Of course it's possible and fairly simply. To resolve this issue simply go to customize the Format Cells . We start from the example shown in column B of the figure below and we get what is shown in column D:

This select the cells that we want to change the format, in our example Select the range B4: B6 and clicking the right mouse button you access to Format Cells. Within Number tab select the Custom Category. In Type wrote the following: 0,??

After pressing OK numbers in the range we selected aligned based on the decimal (show 3 decimal places and we have used 3 questions).