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-3
-2/3 -> [mult.inverse] -> -3/2 which is -1½or -1.5 ; note that a number, when multiplied by its multiplicative inverse will have a product of 1. So if you multiply these two you get 6/6 which equals 1 [negative times negative is positive].
No. The additive inverse of zero or a negative rational number is not negative.
The multiplicative inverse is the negative of the reciprocal of the positive value. Thus the multiplicative inverse of -7 is -1/7.
Yes