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1、0.8+0.6=1.25X80=5.24+3.76=625X0.8=4.2-3.6=0.3216=13+0.26=9.616=14.5-0.24=48=1.3+8.46=0.8-0.45=5X2.4=1-0.01=8.13=2.412=250X0.4=20.5+2.05=37.5X400=0.78+2.2=1.5X8=6X1.5=25X0.4=9.616=4-0.04=4.15+0.85=10-0.1=0.13X7=9.64=0.168=0.8X25=0X4.23=0.57+0.43=2.4X0.2=0.02X500=2.89+9.17=2.8X10=8.29X100=2.5X0.4=4.87
2、-1.7=8.07X1000=25.6X3=O.3288=3.513=7.217=2325=3.6414=1.06O.82=7.828=60050=20.16=84O.25=0.360.9=0.06O.75=2.43=200.5=0.86=100OXO.09=1.3527=0.412.Ol=58O.32=1.0852=0.630.12=8.50.54=5.622.4=0.280.16=二、列竖式计算1. 64+2.35=8.65-6.31=28.44814=0.58X250=12.5+3.6=10.8834=10-7.64=1.86X7=13.88-6.29=9260.15=8500=26.3
3、+7.93=13.6+8.46=1OO.2-2.28=449准确到百分23X7.06=位三、计算（能简便的用简便方法计算）8251.25X164.04X25045.55-(6.82+15.55)3.2X99+3.24.8X39+61X4.834.52-17.87-12.232.5X56+4.5X6548.9X109-4894.57+3.17+3.43+5.835x=45012(6-)=421.26+4x=12(4)8.5-=22.530. 8 14-(9.85+1. 07) 2. 881 0.43-0. 24X3.5 28-(3.4+1.25X2. 4) 7779+llll3 (31.8+3.
4、24) 5 0.64257.8+2.2 469X12+1492 18.1X0. 92+3.93 O. 785.436+1用简便方法计算。0.253.2X12.536X10.10.254422.2X4+17.8X43.8X6.7+3.3X3.81.28X0.29-0.2930.28用递等式计算。2. 6+1.4X1.5-1.5(373.6+4.8)12.52.6+2.4X(1.4-1.05)15.616(0.25+1.25)60-(9.5+28.9)0.1820(2.44-1.8)0.4+0.152.55X7.1+2.45X7.10.815.5-(3.21+5.79)31.54(6+3)22.5+2.5219.46.1X5.67X0.2-0.620.40.7X0.254.854+l49x56+5634x89-l331x56-5616.59xl8-14x2736.178-14556+427.20.8-1.2X56.5(4.8-1.2X4)28-(3.4+1.25X2.4)
