把相关的三个算式5.7+2.8=8.5,0.7×8.5=5.95,15.47÷5.95=2.6列成综合算式是________.
15.47÷[0.7×(5.7+2.8)]
分析:从最后一个算式进行推导;将5.95换成0.7×8.5,又因为8.5=5.7+2.8,再代换到0.7×8.5中,即列成综合算式是:15.47÷[0.7×(5.7+2.8)];据此解答即可.
解答:由分析得出:把相关的三个算式5.7+2.8=8.5,0.7×8.5=5.95,15.47÷5.95=2.6列成综合算式是:15.47÷[0.7×(5.7+2.8)].
故答案为:15.47÷[0.7×(5.7+2.8)].
点评:解决此类型的题目,要从最后一个算式进行突破,运用代换的方式解答.