精品文档+ 3.26 X-4.3 X二、用竖式计算。0.28 X0.25150 X0.120.062随意编辑三、计算下面各题,怎样算简便就怎样算。1.01 X8.50.79 X98 + 0.79 X20.25 5.8 0.41.25 4.8 0.089.54 1014.57 +4.57 X90.48 X1.253.2X1.25 X2.52.6 X4.3+5.7 X2.63.5 X1.06 -0.06 X3.53.591.2+3.8 =260.13 =四、解方程3.5x = 1401685x+ 1.5 = 4.5验过程)4.57 +4.57 X90.756 0.18 =210 +1.4 =2x +5 = 403.5 X1.06 -0.06 X51.3 0.27 =2.688 0.56 =15x+6x =13.7 x = 5.294.2 X 33x = 5.1 (写出检X-0.8X=68+2x=3612x+8x=4.87(x-2)=49(x-2) + 3=748-27+5x=31x + 5+9=21(200-x) + 5=30