问题 解答题 56×1=52-42=0.75-0.5=56×45=54÷74=125×0.08=0.5+0.02=27÷27=74÷514=0.15×6=12÷0.3=0÷511= 答案 56×1=56,52-42=9,0.75-0.5=0.25,56×45=23,54÷74=57,125×0.08=10,0.5+0.02=0.52,27÷27=1,74÷514=4910,0.15×6=0.9,12÷0.3=40,0÷511=0.