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1、1.6 .9 X1.253.6 勺0.110.25 X (1.28 -3.2 )6.25 +0.25 X6 0.486 +0.01 +3.9917.5 X2.3-7.5 X2.390+25 + 4+ 8.93一、直接写出得数：(10分)0.27 X 3 =7.20.83 + 0.27 =0.09X0.4 =102.8-1.09 =2.5 X4.4 =计算：68.8 * =289.9+18 =16.8 攵8 =1.35 攵7 =91.2 38 =26 国.13 =10.625 +25 =2.7 +7.5 =+ ( 0.21 X3.6 )+ 2.5-3.55X 11X4X0.8X5.7 +8.93
2、 X 3.31.25 X 8 =6.5+1.3 =X 101 =67.5 T5 =243.2 曲=0.138+15 =3.64 抬2 =51.3 -0.27 =2.688 电56 =10+25 =25.6 +0.032 =、小数加减乘除及混合运算含简便运算1.计算下面各题,能简算的用简便方法算,并写由简算过程35.72 网.047 2320.138 X6.4 网.124.87 X2.34+48.7 0.26668.0419.751.258.93+ 0.6 =+ 0.1 =8.885.44 T6 =101.79 =15.6 攵4 =0.416+32 =0.756 0.18210+1.4 =126+45 =15+0.06 =