题干
写出差相等的算式．
9=____－____=____－____=____－____=____－____=____－____
=____－____=____－____=____－____=____－____=____－____
答案(点此获取答案解析）
9,0,10,1,11,2,12,3,13,4,14,5,15,6,16,7,17,8,18,9
