①0.75÷[×(0.5﹣)] ②13.7﹣1.32+1.7﹣3.68
③125%×3.2×25 ④11×(+)×9
①
②0.25×0.125×3.2
③
④
8×4×12.5×2.5
×+÷13
+[(-)×]