①856+97
②8.32×101-8.32
③7.5÷ -
④56×( + - )
⑤ ÷[ ×( + )]
⑥22.4-2.3-5.7
45÷[(0.5+)÷12] 12.5×(0.8×8) 2.25×1.8+12.5×0.18
①0.75÷[×(0.5﹣)] ②13.7﹣1.32+1.7﹣3.68
③125%×3.2×25 ④11×(+)×9