It is called multiplication
E.g.
4 + 4 + 4 = 12
4 x 3 = 12
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Because you can obtain the same results by adding the number the amount of times of the other number.
No because the numerator and the denominator must be multiplied or divided by the same number for a given equivalent fraction
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!