There is no reason why you can't add the same number as much as you wish. Though, if you wish to add 4 + 4 + 4 + 4 you could use 4 x 4 = 16
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Multiplying by two is the same thing as adding the number to itsself again. 2 (4) = 4 + 4
Addition and subtraction can be thought of as the same thing because subtracting a negative number is the same as adding it and adding a negative number is the same as subtracting it.
the answer is that you should get a LIFE!
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