问题 解答题 直接写出得数 57×3=45×34=12-0.25=72×48=815÷45=56÷548=36÷98=35÷910= 答案 57×3=157,45×34=35,12-0.25=0.25,72×48=36,815÷45=23,56÷548=8,36÷98=32,35÷910=23.