递等式,又可以叫脱式,即一步只计算一个运算符号,逐步到最后结果。4.32-(1.28+0.72)=4.32-2=2.32
你好4.32-(1.28+0.72) =4.32-2=2.32望采纳
①4.32-2=2.32②4.32-0.72-1.28=3.60-1.28=2.32
=4.32-2=2.32
=4.32-2=2.32