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）一、口算（每题0.5分，共20分）0.8×0.5=1.25×4=4.3×3=24÷30=3.7-2.5=2.2×0.6=0.75+0.25=17÷100=2.8×4=0.15÷0.3=20-0.2=2.5×0.4=5.5+55=5.6÷0.2=1÷0.01=3.5×0.6=10.8÷9=0.95-0.36=0.13×4=84÷4.2=2.26-0.6=0.63+0.47=0.87÷0.3=100÷12.5=5.2×4=0.25×40=1.69÷1.3=6.5+0.35=1.44÷1.2=20-14.2=3.5×0.4=2.5×2.4=9.1÷7=0.72÷0.6=2.3×0.6=11-1.1=9÷2.5÷4=4.5×6×0.2=1.7+0.3-1.7+0.3=2.3×0.2÷2.3×0.2=二、计算下面各题。（每题2分，共30分）15.4+5.6÷712.3×3.1-25.9(16.7-1.4)÷32.3-1.5+4.5×45.6÷0.8-1.9×318-（0.6+2.4×5）（0.24÷0.3+5）×1.5(5-0.68)÷1.2+0.8（80－9.8）×0.6－2.21(12.5-3.6×2.5)÷2[18.95－（8.43+3.87）]×2.8（41-37.4）×（0.9+6.2）1.7×[34.8÷(4.3+1.7)]1.25÷[(12-9.5)×0.2](1.9-1.9×0.9)÷(3.8-2.8)三、用简便方法计算(2，共30分)2.65+8.63+7.35+11.378.5-0.26-1.741.8×10.13.34+6.17-1.34+3.831.25×3.2×2.5930÷0.6÷50.875×101-0.87523.4-0.8-13.4-7.21.25×8818.74×0.18+1.26×0.181.9×2.3+1.9×2.7-1.90.87×60+87×0.5-8.70.9999×0.7＋0.1111×3.70.9+0.99+0.999+0.99999595×96-9696×95

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）2.在□内填上适当的数，使等式成立。（3分）73.06－[□×(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）×（0.12＋0.23＋0.34）－（1＋0.12＋0.23＋0.34）×（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）0.8×0.5=0.41.25×4=54.3×3=12.924÷30=0.83.7-2.5=1.22.2×0.6=1.320.75+0.25=117÷100=0.172.8×4=11.20.15÷0.3=0.520-0.2=19.82.5×0.4=15.5+55=60.55.6÷0.2=281÷0.01=1003.5×0.6=2.110.8÷9=1.20.95-0.36=0.590.13×4=0.5284÷4.2=202.26-0.6=1.660.63+0.47=1.10.87÷0.3=2.9100÷12.5=85.2×4=20.80.25×40=101.69÷1.3=1.36.5+0.35=6.851.44÷1.2=1.220-14.2=5.83.5×0.4=1.42.5×2.4=69.1÷7=1.30.72÷0.6=1.22.3×0.6=1.3811-1.1=9.99÷2.5÷4=0.94.5×6×0.2=5.41.7+0.3-1.7+0.3=0.62.3×0.2÷2.3×0.2=0.04二、计算下面各题。（每题2分，共30分）15.4+5.6÷712.3×3.1-25.9(16.7-1.4)÷3=15.4+0.8=38.13-25.9=15.3÷3=16.2=12.23=5.12.3-1.5+4.5×45.6÷0.8-1.9×318-（0.6+2.4×5）=0.8+18=7-5.7=18-(0.6+12)=18.8=1.3=18-12.6=5.4（0.24÷0.3+5）×1.5(5-0.68)÷1.2+0.8（80－9.8）×0.6－2.21=(0.8+5)×1.5=4.32÷1.2+0.8=70.2×0.6－2.21=5.8×1.5=3.6+0.8=42.12-2.21=8.7=4.4=39.91(12.5-3.6×2.5)÷2[18.95－（8.43+3.87）]×2.8=(12.5-9)÷2=[18.95－12.3]×2.8=3.5÷2=6.65×2.8=1.75=18.62（41-37.4）×（0.9+6.2）1.7×[34.8÷(4.3+1.7)]=3.6×7.1=1.7×[34.8÷6]=25.56=1.7×5.8=9.861.25÷[(12-9.5)×0.2](1.9-1.9×0.9)÷(3.8-2.8)=1.25÷[2.5×0.2]=(1.9-1.71)÷1=1.25÷0.5=0.19÷1=2.5=0.19三、用简便方法计算(2，共30分)2.65+8.63+7.35+11.378.5-0.26-1.741.8×10.1=(2.65+7.35)+(8.63+11.37)=8.5-(0.26+1.74)=1.8×(10+0.1)=10+20=8.5-2=1.8×10+1.8×0.130=6.5=18.183.34+6.17-1.34+3.831.25×3.2×2.5930÷0.6÷5=3.34-1.34+(6.17+3.83)=(1.25×8)×(0.4×2.5)=930÷(0.6×5)=2+10=10×1=930÷3=12=10=3100.875×101-0.87523.4-0.8-13.4-7.21.25×88=0.875×(101-1)=23.4-13.4-(0.8+7.2)=1.25×8×11=0.875×100=10+8=10×11=87.5=18=11018.74×0.18+1.26×0.181.9×2.3+1.9×2.7-1.9=(18.74+1.26)×0.18=1.9×(2.3+2.7-1)=20×0.18=1.9×4=3.6=7.60.87×60+87×0.5-8.70.9999×0.7＋0.1111×3.7=8.7×6+8.7×5-8.7=0.1111×(9×0.7)＋0.1111×3.7=8.7×(6+5-1)=0.1111×6.3＋0.1111×3.7=8.7×10=0.1111×10=87=1.1110.9+0.99+0.999+0.99999595×96-9696×95

=4-0.1-0.01-0.001-0.0001=101×95×96-101×96×95=4-0.1111=0=3.8889四、解决下列问题（20分）1.在□填上合适的数字。（每题3分，共6分）2.在□内填上适当的数，使等式成立。（3分）73.06－[□×(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)+(0.03-0