Borrow 500 yuan from dad+borrow 500 yuan from mom = buy shoes, 970 yuan +30 yuan,
(Borrow 500 yuan from dad-10 yuan)+(Borrow 500 yuan from mom-10 yuan) = Buy shoes 970 yuan +(30 yuan-10 yuan-10 yuan),
Owe dad 490 yuan+owe dad 490 yuan = buy shoes 970 yuan +65438+ 00 yuan left.