一、直接写出计算结果。 0.75×10= 1.2×8= 0.8×5= 4.2×3= 2×0.16= 10×1.8= 0.25×4= 0.24×5= 1.24×3= 0.2×0.3= 5.21×4= 1×0.806= 1.5×1.2= 7.7×0.1+7.23= 0.3×1.2= 2.5×0.4= 0.18×0.3= 0.14×40= 3.5×4= 1－3.1×0.2= 10×0.25= 2.4×2= 9.6×0= 1.25×4= 0.65×2= 0.25×75×4= 10.1×2.5= 5.28＋2.55= 2.5×0.6= 8.8×0.2= 1.3×7= 18×0.5= 0.7×1.1= 6.956×0= 1.25×32×2.5= 二、列竖式计算。 1.25×7= 7.3×1.2= 3.77×2.1= 3.2×2.4= 2.7×5.3= 0.25×0.08= 0.3×0.4= 1.25×0.2= 100－0.25×98－0.25×2= 7.12×13= 2.28×5= 4.8×1.5= 6.2×2.8= 0.25×3.6= 38.4×2.3= 4.3×1.7= 0.5×0.16= 8.02×2.8= 1.8×3.4= 28.5×9.8= 2.4×0.18= 3.6×1.5= 0.56×2.9= 1.6×7.5= 2.1×0.78= 6.25×3.7= 1.06×3.1= 9.84×5.06= 3.108×2.5= 三、用简便方法计算。99×101 7.8×0.8×1.25 1.25×（8+0.8） 50×0.13×0.2 26×0.73+15.12 2.45-2.45×0.8 70×17.2+10 22-1.6×7 1.83+3.79×1.2 10.05×2.4= 5.43×2.12= 9.9×101 8+10）×12.5 2.5101—2.5 1.2×2.5+0.8×2.5 3.45×1.2—2.25 3.6×2.8+2.7 15.78×4-4×3.78 0.25×13.7×0.4 10－0.34－0.66 750×2.15= 4.056×3.12= 125×53×8 1.7×4.2+1.7×5.8 8.71×47+8.71×53 1.01×2.6 0.55×1.2×2 5.6+17.2×2.5 25×13+0.9 0.89×4.8+0.89×5.2 0.29×102 （ 本文来源：https://www.wddqw.com/doc/2f4f5525cf84b9d528ea7ac3.html