a+______﹦50+______ 104+______﹦82+______
题型:填空题
问题:
a+______﹦50+______
104+______﹦82+______
______+225+285=116+(285+______)
(135+569)+65=______+(______+______)
a+______﹦50+______
104+______﹦82+______
______+225+285=116+(285+______)
(135+569)+65=______+(______+______)