小学五年级数学计算能力竞赛试题(含答案)

五年级数学计算能力竞赛试题（时间：60分钟总分100分）、口算（每题0.5分，共20分）0.8X0.5二1.25X4=4.3X3=24^30=3.7-2.5=2.2X0.6=0.75+0.25=17^100=2.8X4=0.15F0.3二20-0.2=2.5X0.4=5.5+55=5.6F0.2二1^0.01=3.5X0.6=10.8^9=0.95-0.36=0.13X4=84F4.2二2.26-0.6=0.63+0.47=0.87F0.3二100^12.5=5.2X4=0.25X40=1.69F1.3二6.5+0.35=1.44F1.2二20-14.2=3.5X0.4=2.5X2.4=9.1F7二0.72F0.6二2.3X0.6=11-1.1=9F2.5F4二4.5X6X0.2=1.7+0.3-1.7+0.3=2.3X0.2F2.3X0.2二二、计算卜面各题。（每题2分，共30分）15.4+5.6^712.3X3.1-25.9(16.7-1.4)F32.3T.5+4.5X45.6F0.8-1.9X318-(0.6+2.4X5)0.875X101-0.8750.875X101-0.87523.4-0.8-13.4-7.21.25X88(0.24F0.3+5)X1.5(0.24F0.3+5)X1.5(5-0.68)F1.2+0.8(80—9.8)X0.6—2.213.34+6.17-1.34+3.833.34+6.17-1.34+3.831.25X3.2X2.5930F0.6F5(12.5—3.6X2.5)-F2[18.95—(8.43+3.87)]X2.8(41-37.4)X(0.9+6.2)1.7X[34.8F(4.3+1.7)]1.25F[(12—9.5)X0.2](1.9-1.9X0.9)F(3.8-2.8)(12.5—3.6X2.5)-F2[18.95—(8.43+3.87)]X2.8(41-37.4)X(0.9+6.2)1.7X[34.8F(4.3+1.7)]1.25F[(12—9.5)X0.2](1.9-1.9X0.9)F(3.8-2.8)三、用简便方法计算(2，共30分)2.65+8.63+7.35+11.378.5-0.26-1.741.8X10.1

18.74X0.18+1.26X0.181.9X2.3+1.9X2.7-1.90.87X60+87X0.5-8.70.9999X0.7+0.1111X3.718.74X0.18+1.26X0.181.9X2.3+1.9X2.7-1.90.87X60+87X0.5-8.70.9999X0.7+0.1111X3.79595X96-9696X950.9+0.99+0.999+0.99999595X96-9696X95四、解决下列问题（20分）1.在□填上合适的数字。（每题3分，共6分）143□丿143□丿q□口口—2•在□内填上适当的数，使等式成立。(3分)73.06—[口％(4.465+5.535)+42.06]=33•计算下列两题。(每题4分，共8分)1+0.99—0.98—0.97+0.96+0.95—0.94—0.93——0.04+0.03—0.02—0.01(1+0.12+0.23)X(0.12+0.23+0.34)—(1+0.12+0.23+0.34)X(0.12+0.23)4•小灵在计算除法时，把除数16错写了19，结果得到的商是17还余13，你能算出它的正确结果吗？（3分）

五年级数学计算能力竞赛试题答案（时间：60分钟总分100分）口算（每题0.5分，共20分）0.8X0.5=0.41.25X4=54.3X3=12.924^30=0.83.7-2.5=1.22.2X0.6=1.320.75+0.25=117^100=0.172.8X4=11.20.15^0.3=0.520-0.2=19.82.5X0.4=15.5+55=60.55.6^0.2=281^0.01=1003.5X0.6=2.110.8^9=1.20.95-0.36=0.590.13X4=0.5284^4.2=202.26-0.6=1.660.63+0.47=1.10.87^0.3=2.9100^12.5=85.2X4=20.80.25X40=101.69^1.3=1.36.5+0.35=6.851.44^1.2=1.220-14.2=5.83.5X0.4=1.42.5X2.4=69.1F7=1.30.72^0.6=1.22.3X0.6=1.3811-1.1=9.99F2.5F4=0.94.5X6X0.2=5.41.7+0.3-1.7+0.3=0.62.3X0.2^2.3X0.2=0.04二、计算下面各题。15.4+5.6F7=15.4+0.8=16.22.3-1.5+4.5X4=0.8+18=18.8(每题2分，共30分)12.3X3.1-25.9=38.13-25.9=12.235.6F0.8-1.9X3=7-5.7=1.3(16.7-1.4)F3=15.3^3=5.118-(0.6+2.4X5)=18-(0.6+12)=18-12.6=5.4(5-0.68)F1.2+0.8(5-0.68)F1.2+0.8=4.32^1.2+0.8=3.6+0.8=4.4(0.24F0.3+5)X1.5=(0.8+5)X1.5=5.8X1.5=8.7(80—9.8)X0.6—2.21=70.2X0.6—2.21=42.12-2.21=39.91(12.5-3.6X2.5)-F2(12.5-3.6X2.5)-F2=(12.5-9)F2=3.5F2=1.75(41-37.4)X(0.9+6.2)=3.6X7.1=25.561.25F[(12-9.5)X0.2]=1.25F[2.5X0.2]=1.25^0.5=2.5[18.95—(8.43+3.87)]X2.8=[18.95—12.3]X2.8=6.65X2.8=18.621.7X[34.8F(4.3+1.7)]=1.7X[34.8F6]=1.7X5.8=9.86(1.9-1.9X0.9)F(3.8-2.8)=(1.9-1.71)F1=0.19F1三、用简便方法计算(2，共30分)2.65+8.63+7.35+11.37=(2.65+7.35)+(8.63+11.37)=10+20303.34+6.17-1.34+3.83=3.34-1.34+(6.17+3.83)8.5-0.26-1.74=8.5-(0.26+1.74)三、用简便方法计算(2，共30分)2.65+8.63+7.35+11.37=(2.65+7.35)+(8.63+11.37)=10+20303.34+6.17-1.34+3.83=3.34-1.34+(6.17+3.83)8.5-0.26-1.74=8.5-(0.26+1.74)=8.5-2=6.51.25X3.2X2.5=(1.25X8)X(0.4X2.5)1.8X10.1=1.8X(10+0.1)=1.8X10+1.8X0.1=18.18930F0.6F5=930F(0.6X5)=2+10=10X1=930^3=12=10=3100.875X101-0.87523.4-0.8-13.4-7.21.25X88=0.875X(101-1)=23.4-13.4-(0.8+7.2)=1.25X8X11=0.875X100=10+8=87.5=18=10X11=1100.875X101-0.87523.4-0.8-13.4-7.21.25X88=0.875X(101-1)=23.4-13.4-(0.8+7.2)=1.25X8X11=0.875X100=10+8=87.5=18=10X11=11018.74X0.18+1.26X0.18=(18.74+1.26)X0.18=20X0.18=3.61.9X2.3+1.9X2.7-1.9=1.9X(2.3+2.7-1)=1.9X4=7.60.87X60+87X0.5-8.7=8.7X6+8.7X5-8.7=8.7X(6+5-1)=8.7X10=870.9+0.99+0.999+0.9999=4-0.1-0.01-0.001-0.0001=4-0.1111=3.8889=0.1111X10=1.1119595X96-9696X95=101X95X96-101X96X95=0四、解决下列问题（20分）1.在□填上合适的数字。（每题3分,共6分）□tntnT7回LFTiTA2•在□内填上适当的数，使等式成立。(3分)73.06—[口％(4.465+5.535)+42.06]=32.83•计算下列两题。(每题4分，共8分)1+0.99—0.98—0.97+0.96+0.95—0.94—0.93——0.04+0.03—0.02—0.01=(1-0.98)+(0.99-0.97)+(0.96-0.94)+(0.95-0.93)+……(0.04-0.02)+(0.030.01)=0.02X50=1(1+0.12+0.23)X(0.12+0.23+0.34)—(1+0.12+0