2016-08-02
展开全部
.5×8=3.6×0.4=39.68×0=47.6×1=4÷0.5=12÷0.06=12÷1.2=3÷30=0.15×7=3.2×6+3.2×4=2.5×4×0.36=0.2+0.8×0.5=6.03×1000=10×0.6=6.45×0.01=0.1×0.1=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=0.27÷0.003=0.01÷0.1=1.8×20=x-0.4x=5d-2d=3.6÷0.4=0.6×0.8=2.4×3=0.12×0.7=4÷5=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=38.5×0×0.38=0.6×0.8=3×0.9=2.5×0.4=3.6×0.412.5×8=50×0.04=80×0.3=1.1×9二、用竖式计算8.08-2.68=5.546+29.38=17.04×0.26=8.35×3.5=三、竖式计算(得数保留一位小数)0.43×0.29≈52.6×0.23≈4.58×0.37≈四、竖式计算(得数保留两位小数)4.3×8.14≈27.6×0.45≈27.6×0.45≈20÷12≈2.9×1.8≈5.08×0.25≈五、竖式计算(得数保留三位小数)2.5÷0.7=2.5÷0.7=3.25×9.04=六、竖式计算(用循环小数表示商)36.8÷16≈10.1÷3.3≈15.3÷11≈0.78÷1≈七、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=6.2×2.1-2.12.8-2.8×0.15=2.8×1.43+0.57=10-6.06+8.5=6×0.25×1.8=144÷3.6+27.2=0.87×3.16+4.64=6.8×0.75÷0.5=13.75÷0.125–2.75=53+23.4÷7.2=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)=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=5180-705×6=24÷2.4-2.5×0.8=3.416÷(0.016×35)=八、用简便方法计算下面各题5.12+2.54+4.88=12.5×17.8×0.8=9.9×2.5=9.4×5.8+10.6×5.8=0.125×0.32×0.25=9.6+9.6×99=2.8×7.6+1.4×2.8+2.8=6.3×10.1=0.25×3.2×12.5=12.5×9.7?12.5×8.7=3.7×91.6+6.3×91.6=16.84÷40÷0.25=12.5×0.4×2.5×8=9.5×101=4.2×7.8+2.2×4.2=2.55×7.1+2.45×7.1=
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