Question

设甲数为x，乙数为y，则甲丶乙的积减去甲丶乙两数的和用代数式表示是____;

甲丶乙两数的差除以甲丶乙两数的积用代数式表示是_____

Answer 1

XY-(X+Y)
(X-Y)/XY

Answer 2

xy-(x+y)=xy-x-y
(x-y)/xy=1/y-1/x

Answer 3

XY-(X+Y)
(X-Y)/XY

Answer 4

x*y-(x+y) (x-y)/(x*y)

Answer 5

xy-(x+y)
(x-y)/(xy)