①2.8×3.6+1.4×2.8
②4.75×101
③3.17×1.2+1.83
④4.95-14.82÷7.6
⑤12.5×16×2.5
①0.53×2.5+
②25×0.032×12.5
③ [()×]
④6.83+17.9﹣0.83+32.1
①7.4﹣6.62+20.6﹣13.38
②×+×
③(-+)÷
④2×0.8×12.5×50%
⑤÷(÷+)
⑥×[1÷(+)]
①
②1.25×1.3×80
③7.28-3.14+1.72-2.86
④
⑤
⑥