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1、-小学数学五年级上册简便计算练习一、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
2、-(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=1110.5+x+21=5
3、6 48-27+5x=31 x+5.6=9.41.4X8-2x=6 0.1(x+6)=3.3X0.4 7(6.5+x)=87.5口算78100 0150 320.4 1300300=2.6100 15015 320.4 260010032.88 1.644 30060 18700= 40080 644 36020 42070 194 54090 742 3604027030 54060= 5719 7070 40050 35070 81090 4305 6.61.1 7.64 1.540.22 4800200= 1.890.63 3600180= 1283.2 11055 32.841 7500.5= 4.320.8 96012 20040 42030 14271 56080 600.02 66030 4800.8 7240.6321 6400800= 0.0520 511.74816 7035 9.22.3 2.70.31.50.4 280.03 0.3819 0.683.4402 65013 98014 680347204 80016 7200.5 230466000.03 16040 0.2330 501.2 330030= 9600300= 4000500= 2500500=1.4300= 0.26200= 0.5090= 56070= 1500300= -第 5 页-