6.9＋4.8＋3.10.456＋6.22＋3.7815.89＋(6.75－5.89)4.02＋5.4＋0.985.17－1.8－3.213.75－(3.75＋6.48)3.68＋7.56－2.687.85＋2.34－0.85＋4.6635.6－1.8－15.6－7.23.82＋2.9＋0.18＋9.19.6＋4.8－3.67.14－0.53－2.475.27＋2.86－0.66＋1.6313.35－4.68＋2.6573.8－1.64－13.8－5.3647.8－7.45+8.80.398+0.36+3.6415.75+3.59－0.59+14.2566.86－8.66－1.340.25×16.2×4(1.25－0.125)×83.6×1023.72×3.5＋6.28×3.536.8－3.9－6.115.6×13.1－15.6－15.6×2.14.8×7.8＋78×0.5232＋4.9－0.94.8×100.156.5×9.9＋56.57.09×10.8－0.8×7.0925.48－(9.4－0.52)4.2÷3.5320÷1.25÷818.76×9.9＋18.763.52÷2.5÷0.43.9－4.1＋6.1－5.95.6÷3.59.6÷0.8÷0.44.2×99＋4.217.8÷(1.78×4)0.49÷1.41.25×2.5×323.65×10.115.2÷0.25÷40.89×100.1146.5－(23＋46.5)3.83×4.56＋3.83×5.444.36×12.5×89.7×99＋9.727.5×3.7－7.5×3.78.54÷2.5÷0.40.65×1013.2×0.25×12.5(45.9－32.7)÷8÷0.1253.14×0.68＋31.4×0.0325.6÷1.25÷0.8÷2.5÷0.47.2×0.2＋2.4×1.48.9×1.017.74×（2.8－1.3）＋1.5×2.263.9×2.7＋3.9×7.318－1.8÷0.125÷0.812.7×9.9＋1.2721×（9.3－3.7）－5.615.02-6.8-1.025.4×11-5.42.3×16+2.3×23+2.39.43-（6.28-1.57）3.65×4.7－36.5×0.3746×57＋23×8613.7×0.25－3.7÷42.22×9.9+6.66×6.7101×0.87-0.91×8710.7×16.1-15.1×10.70.79×1994.8+8.63+5.2+0.375.93+0.19+2.811.76+0.195+3.242.35+1.713+0.287+7.651.57+0.245+7.436.02+3.6+1.980.134+2.66+0.8661.27+3.9+0.73+16.17.5＋4.9－6.53.07－0.38－1.621.29＋3.7＋2.71＋6.38－2.45－1.553.25＋1.79－0.59＋1.7523.4－0.8－13.4－7.20.32×4033.2＋0.36＋4.8＋1.641.23＋3.4－0.23＋6.60.25×3612.7－（3.7＋0.84）36.54－1.76－4.540.25×0.73×47.6×0.8＋0.2×7.60.85×1990.25×8.5×41.28×8.6＋0.72×8.612.5×0.96×0.810.4－9.6×0.350.8×（4.3×1.25）3.12＋3.12×9928.6×101－28.60.86×15.7－0.86×14.72.4×1022.31×1.2×0.514－7.32－2.682.64＋8.67＋7.36＋11.3370÷28（2.5－0.25）×0.49.16×1.5－0.5×9.163.6－3.6×0.563.4÷2.5÷0.44.9÷1.43.9÷（1.3×5）（7.7＋1.54）÷0.72.5×2.42.7÷4515÷（0.15×0.4）0.35×1.25×2×0.832.4×0.9＋0.1×32.415÷0.254.5÷1.84.2÷3.5930÷0.6÷52.73＋0.89＋1.274.37＋0.28＋1.63＋5.7210－0.432－2.5689.3－5.26－2.7413.4－（3.4＋5.2）114.9－（5.2＋4.9）18.32－5.47－4.3217.29－5.28－6.2925×6.8×0.040.25×32×0.1256.4×1.25×12.50.45×2010.58×10.150.2×994.7×9.93.28×5.7＋6.72×5.72.1×99＋2.11.7×9.9＋0.1723×0.1＋2.3×9.90.18＋4.26－0.18＋4.260.58×1.3÷0.58×1.37.3÷4＋2.7×0.253.75×0.5－2.75÷25.26×0.125＋2.74÷86.3÷1.84.2÷3.59.5÷（1.9×8）12.8÷（0.4×1.6）930÷0.6÷563.4÷2.5÷0.46.9＋4.8＋3.115.89＋(6.75－5.89)7.85＋2.34－0.85＋4.6635.6－1.8－15.6－7.213.75－(3.75＋6.48)47.8－7.45+2.5566.86－8.66－1.340.25×16.2×40.25×32×0.1252.5×(4+0.4)(1.25－0.125)×84.8×100.14.2×9956.5×9.9＋56.55.4×11-5.43.83×4.56＋3.83×5.447.09×10.8－0.8×7.093.65×4.7－36.5×0.3710.7×16.1-1.1×10.7+10.7×54.9÷1.43.9÷（1.3×5）63.4÷2.5÷0.4（7.7＋1.4）÷0.7一、选择题。（24分）1．25+25可以直接相加，是因为两个加数（）。A．分子相同B。分母相同C。都是真分数D。都是最简分数2．16－645=（）A．1045B。1015C。945D。9153．计算513－0.6＋317时，第一步是（）。A．把小数化成分数B。把分数化成小数C。用加法运算定律直接计算D。用减法运算性质直接计算4．514与213的和减去它们的差，结果是多少？正确的算式是（）。A．514＋213－514－213B。514－213＋514－213C．514＋213－(514－213)D。514＋213＋(514－213)5．王师傅做一件工作要20天完成，他做了5天，还剩下这件工作的（）。A．41920B。1945C。14D。3426．某商店八月份利润是415...
