Iam doing microsoft excel and i have do formulas, can some explain to me how do them?

In excel Firstly, type equal sign(=) to write formula and type formula as your want.

Explanation:

Example:

If you  want to add 4 no . that are write in these cell no.

B3=45

B4=29

B5=72

B6=63

You shall write formula in cell no B7

The addition formula are:  =SUM(B3:B6)

and then press enter key, Your ans. will write in this cell automatically.

Type equal sign before you write a formula. it is compulsory.