问题
填空题
横线里最大能填几?
90×______<557
80×______<407
80×______<405
______×4<310
______×50<470
______×60<550
20×______<130
50×______<330.
答案
90×6<557
80×5<407
80×5<405
77×4<310
9×50<470
9×60<550
20×6<130
50×6<330
故答案为:6,5,5,77,9,9,6,6.