练习:递等式计算(能简便的简便)。 ×8×12.5% =×(8×0.125) =×1 = 72%×+0.28÷ =72%×+0.28× =×(72%+0.28) =×1 = 0.43÷8+57%× =0.43×+0.57× =×(0.43+0.57) = ××80%