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小学数学五年级上册简便计算练习1一、请用简便方法计算下列各题0.250.28 0.1253.22.5 3540.2 0.2540.254 3.59.9 3.599+3.5 3.5101-3.5 3.59.9+3.50.1 3.52.7+350.733.52.7-3.50.7 (32+5.6)0.8 3.50.6-0.50.64.93.5 70.254 70.125 8 7.35(7.350.25) 7.35(7.350.25) 7.325-(5.325+1.7)3.29+0.73+2.27 3.29-0.73-2.27 7.5+2.5-7.5+2.57.325-3.29-3.325 7.325-(5.325+1.7) 7.325-(5.325-1.7) 二、解方程（要注明依据）12x-8x=4.8 1.2x=81.6 (200-x)5=30x-0.7x=3.6 5.6x=33.6 3.5-5x=2x+3x+10=70 5x+x=9 9.8-x=3.85x-45=100 4.5x-x=28 75.6x=12.6(x-140)70=4 x+2x+18=78 (27.5-3.5)x=40.5x+8=43 3200=450+5X+X 45x=201.5(x+1.6)=3.6 155X-2X=18 91x 1.37(6.5+x)=87.5 9x-x=16 6-2x=11
