(-3又1/3)(+3/5)= 15/8(-4/15)= (-15)(-1又2(-3又1/3)(+3/5)= 15/8(-4/15)= (-15)(-1又2/3)= 0-(-1又1/3)*3=

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(-3又1/3)*(+3/5)= 15/8*(-4/15)= (-15)*(-1又2
(-3又1/3)*(+3/5)= 15/8*(-4/15)= (-15)*(-1又2/3)= 0-(-1又1/3)*3=

第一个-2

(-3又1/3)*(+3/5)= 15/8*(-4/15)= (-15)*(-1又2(-3又1/3)*(+3/5)= 15/8*(-4/15)= (-15)*(-1又2/3)= 0-(-1又1/3)*3=