五年级上册数学计算能力竞赛题班级姓名成绩一、直接写得数。（29分）1－0.2=9＋9.1=45÷0.5=4.65－0.35=1.6+12.4=600×1.2=0.16×5=1.25×0.8=0.3÷6=3.2÷1.6=0.25×0.4=3.84+2.26=2÷0.02=18÷0.18=3.2÷0.4=0.9²=6.4y－5y=8.2t－t=a－0.4a=x+0.2x=1÷0.1÷2=6.37×8.15×0=12－0.15－1.85=0.2×9×0.5=3.74÷0.25÷4=97×1.25×0.8=（0.4＋4）×2.5=3.2+0.8－3.2+0.8=7.5×2÷7.5×2=二、用竖式计算。（最后一小题要验算，共10分）0.76×3.08=2.04÷2.4=0.672÷0.48=验算：三、解方程。（最后一小题要验算，共19分）x÷1.42=0.56x－0.9=4.52（5－x）=6.44x＋0.4x=1.320.5x－1.6×3=4.2x－0.3x=16.1验算：\n四、计算下面各题，怎样简便就怎样算。（42分）①6.5＋3.5×1.4②0.25×4.37×4③1.25×4×0.8×2.5④7.47＋3.8＋2.53＋1.2⑤11.8－1.52－0.48⑥43.5÷1.25÷8⑦1.25×（8－0.8）⑧（0.4＋4）×2.5⑨0.68×101⑩3.6×（10－9.75）⑾9.8×3.5⑿4.23×0.65＋0.65×1.77⒀7.5×2.41－7.5×0.41⒁4.65×101－4.65