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1、精品文档，仅供学习与交流，如有侵权请联系网站删除能简算的要简算31.54(6+3) =30.814(9.851.07)60(9.528.9)0.180.815.5-(3.21+5.79) =2.8810.430.243.5 20(2.441.8)0.40.15 28-(3.4+1.252.4) 2.557.1+2.457.1 0.78+5.436+1 =4.070.86+9.12.5 =30.814(9.851.07) =7779+1113 =（31.8+3.24）5 =0.64257.8+2.2 =22.5+2.52 =19464.81.80.9 =36.724.259.9 =5180705
2、6 =242.42.50.8 =(4121+2389)7 =67115-974 =46912+1492 =405(3213-3189) =3.416（0.01635） =0.8(106.76)1.2 =19.46.12.3 =5.670.2-0.62 =18.10.92+3.93 =0.043-0.24+0.875 =0.40.70.25 =0.75102 +100-56.23 60(9.528.9)0.18 =2.8810.430.243.5 =20(2.441.8)0.40.15 =28-(3.4+1.252.4) =2.557.1+2.457.1 =7779+11113 =0.815.5-(3.21+5.79) =（31.8+3.24）5 =31.54(6+3) =0.64257.8+2.2 =22.5+2.52 =19464.81.80.9 =36.724.259.951807056242.42.50.8 =(4121+2389)7 =67115-974 46912+1492 =405(3213-3189) =3.416（0.01635） =0.8(106.76)1.2 =19.46.12.3 5.670.2-0.62 =18.10.92+3.93 =0.40.70.25 0.78+5.436+1 4.070.86+9.12.5【精品文档】第 2 页