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The definition of an multipilicative inverse is a number that's times by the known number to attain a product of one. To find the multiplicative inverse is the same thing as the recipricol of the number. To find the multiplicitive inverse or recipricol of a number, first turn the number into a fraction, then switch the numerator and denominator around. The result is your multiplicitive inverse.
3 and a half = 7/2 so its multiplicative inverse is 2/7.
actually the answer is 1 and 27/50 because when you divide you have to multiply the multiplicitive inverse so it would be -11/5 times -7/10 = 1 and 27/50.
Multiplying by 1 and a half.
The inverse of add 7 is minus 7 Example: 20+7=27 to check do... 27-7=20