first,if the symbols is Like or simiLar it is POSITIVE sign .. EX. (+5)*(+2)=(+10) (-3)*(-2)=(+6) then,if the symboL is disimilar or unLike it is NEGATIVE SIGN EX:(+5)*(-2)=(-10) (-4)*(+5)=(-20) if there are 3 numbers this ruLes must foLLow ! (+5)*(+4)*(-2) 1st:(+5)*(+4)=(+20) 2nd: copy the answer then muLtipLy by (-2) (+20)*(-2)=(-40) is the answer .. hope it can heLp :)