45÷[(0.5+)÷12] 12.5×(0.8×8) 2.25×1.8+12.5×0.18
①
②0.25×0.125×3.2
③
④
①2-- ②2.5×4÷2.5×4 ③436+785﹣136 ④15÷[(-)×]
①0.53×2.5+
②25×0.032×12.5
③ [()×]
④6.83+17.9﹣0.83+32.1
①26×15﹣200
②8×4×12.5×0.25
③×+
④12÷[()×]
①7.4﹣6.62+20.6﹣13.38
②×+×
③(-+)÷
④2×0.8×12.5×50%
⑤÷(÷+)
⑥×[1÷(+)]