北师大版五年级数学寒假作业.doc

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1、一．口算0.5×8=3.6×0.4=39.68×0=47.6×1=0.15×7=4÷0.5=12÷0.06=12÷1.2=3÷30=3.2×6+3.2×4=二．竖式计算8.08－2.68＝5.546＋29.38＝17.04×0.26＝8.35×3.5＝三．脱式计算2.65+2.77）÷（1.98-0.98）=3.7×91.6+6.3×91.6=0.45×12×0.2=6.2×2.1－2.1=一．口算0.2+0.8×0.5=6.03×1000=10×0.6=6.45×0.01=2.5×4×0.36=0.1×0.1=0.24×0.5=5.4＋3.6=1.25－0.25=10.2×

2、4.5＝二．竖式计算（得数保留一位小数）0.43×0.29≈52.6×0.23≈4.58×0.37≈2.9×1.8≈三．脱式计算2.8×1.43＋0.57=10－6.06＋8.5=6×0.25×1.8=144÷3.6＋27.2=一．口算0.24×0.5=5.4＋3.6=1.25－0.25=10.2×4.5＝2.5×6＝9×0.25＝0.125×4=1.25×8×0.5=16×0.01=1.78÷0.3=二．竖式计算4.3×8.14≈27.6×0.45≈27.6×0.45≈20÷12≈三．脱式计算0.87×3.16+4.64=6.8×0.75÷0.5=13.75÷0.125–2

3、.75=53+23.4÷7.2=一．口算0.01÷0.1=1.8×20=x-0.4x=5d-2d=0.27÷0.003=3.6÷0.4=0.6×0.8＝2.4×3＝0.12×0.7＝4÷5＝二．竖式计算2.5÷0.7=2.5÷0.7=3.25×9.04=5.08×0.25≈三．脱式计算2.881÷0.43－0.24×3.5=28-(3.4+1.25×2.4)=（31.8+3.2×4）÷5=31.5×4÷(6+3)=一．口算1.6÷0.5＝0.2÷0.05＝2.5×2.3×4=1.5÷1.5＋1.5=3.6－1.2÷2.4=4.7×6＋4×4.7=0.5×4÷0.5×4=38.

4、5×0×0.38=0.6×0.8=3×0.9=二．竖式计算36.8÷16≈10.1÷3.3≈15.3÷11≈0.78÷1≈三．脱式计算0.64×25×7.8+2.2=2÷2.5+2.5÷2=194－64.8÷1.8×0.9=36.72÷4.25×9.9=一．口算2.5×0.4=3.6×0.4=12.5×8=50×0.04=80×0.3=1.1×9=9.32-5.98= 7.61-7.09=9.73-5.77=8.71+3.59=二．竖式计算1．64＋2．35=8．34－6．22=22．4÷7=0．48×350=三．脱式计算5180－705×6=24÷2.4－2.5×0.8=3

5、.416÷（0.016×35）=9.4×5.8＋10.6×5.8=一口算8.03-7.77=1.64+1.32=9.29-7.66=2.26+9.34=6.45-4.57=5.19+7.38=5.74+8.14= 7.81+6.1=7.72+7.07= 9.31-4.22=  二，竖式2.14×3.6=0.15×0.84=2.07×4.8=2.05÷11=三．想一想，下面各题怎样算简便就怎样算！3.04+5.83+16.96+4.171.25×32×253.25×1.6-0.6×3.250.88÷4÷0.25一．请你在一分钟内快速口算出下面各题的得数。3.8+5.2=6.5×

6、4=10-0.99=3.8÷1.9=13.9÷0.1=5.1÷17=0.25×8×0.4=1.25×80=4.8÷0.24=0.63÷21=二．认真计算下面各题，除不尽的得数保留两位小数。（23.6-5.20.4）÷6.726.7÷[（2.53+1.84）×5]1.25×5.7×8    10÷0.2÷2.5三．计算下面各题，能用简便方法计算的要用简便方法计算。0.25×8.3×4+1.723.6-0.5×0.5-6.752.3×（5.38-1.82）+6.44×2.3（2.4+2.4+2.4+2.4）×0.25一口算630÷70=4.3-0.8=3.4+1.6=1.8÷0.

7、3=2.5×40=4×700=18×50=4.2÷6=7.2＋2.8＝　　0.9×0.01＝二．竖式计算12．6＋3．4=10－7．64=9．52÷34=8×1．36=三．脱式计算13.8×4.5+6.28.032+12.6÷0.421.3×1.8-16.39153÷0.51÷3一．口算12×0.6=0.1÷0.001=3.2÷0.08=2.8×0.2=7.9+3.1=0.9×0.5=0.24×5=（0.85-0.85）×0.95=2.5×4=  20×0.5=    二．竖式计算13．88－6．29=