①0.53×2.5+
②25×0.032×12.5
③ [()×]
④6.83+17.9﹣0.83+32.1
①
②0.25×0.125×3.2
③
④
8×4×12.5×2.5
×+÷13
+[(-)×]
①7.4﹣6.62+20.6﹣13.38
②×+×
③(-+)÷
④2×0.8×12.5×50%
⑤÷(÷+)
⑥×[1÷(+)]
①2.75×6.2+27.5×0.38
②0.125×32×2.5
③15.72-2.17-1.83+4.28
⑤
⑥