3.3×1.8+2.5425×0.4用简便计算算

五年级数学第五单元简易方程复习题
世贸小学五(1)班第五单元《简易方程》练习题一、口算0.5×8=3.6×0.4=39.68×0=47.6×1=50×0.04=80×0.3=4÷0.5=12÷0.06=12÷1.2=3÷30=3.6×0.4=12.5×8=0.15×7=3.2×6+3.2×4=1.1×9=2.5×0.4=2.5×4×0.36=0.2+0.8×0.5=6.03×1000=10×0.6=6.45×0.01=0.6×0.8=5d-2d=0.1×0.1=0.24×0.5=5.4+3.6=1.25-0.25=0.5×4÷0.5×4=10.2×4.5=2.5×6=9×0.25=0.125×4=0.12×0.7=2.4×3=1.25×8×0.5=16×0.01=1.78÷0.3=0.27÷0.003=38.5×0×0.38=0.01÷0.1=1.8×20=x-0.4x=3.6÷0.4=0.6×0.8=3.2-0.1=4÷5=1.6÷0.5=0.2÷0.05=2.5×2.3×4=4.7×6+4×4.7=1.8÷0.3=1.5÷1.5+1.5=3.6-1.2÷2.4=3×0.9=0.32×5=0.27÷0.03=1.6×0.5=1.8×20=0.01÷0.1=6.5×10=80×0.3=2.5×4=0÷21.35=18×0.01=2.5-2.5÷5=0÷4.61=0.03×2.3=0.37×0.4=2.34×0.2=1.25×8=1÷0.125=0.4×5=4.2÷0.2=4.2-1.6=21.7÷0.07=1.6×7=25.25÷5=1.25×8=60×0.9=2.4×5=10÷2.5=0.8×0.1=0÷7.05=0.4×2.5=1.7+3.3×0.2=6.13×0=3.9÷0.65=3.6÷10=6.3+0.37=2.6÷0.02=0.11×5=4.8÷4=0.25×4=1.12×0.3=0.8×0.5=0÷7.05=1.5×30=3.5+6.5×20=2.8÷100=6.3+0.37=2.6÷0.02=0.13×5=9.6÷6=0.25×4=2.34×0.2=0.6×1.5=0÷7.05=2.3×20=二、竖式计算2.08×7.5=0.43×0.28=90.75÷3.3=1.05×2.4=16.9÷0.13=1.89÷0.54=3.08×0.43=3.7×0.016=0.25×40=5.61÷6.1=5.22÷29=13.95÷3.1=5.5×66=1.3÷0.9=5.93×0.76=7.8×0.35=21.84÷0.7=0.042×0.54=28.14÷6.7=4.1-1.298=0.396÷1.2=0.25×0.046=20-5.674=6.84×7.45=15.6×13=5.4÷0.036=36.72÷2.4=5.778÷5.4=110.7÷0.54=10.1÷3.3=1.204÷0.43=3.25×9.04=9.2÷2.3=18.9÷0.54=6.45×0.73=7.15×22=1.55÷3.9=1.5×26.7=54÷0.36=7.218÷36=35.4×4.2=0.462÷1.4=5.24÷7.2=2.52×3.4=0.756÷0.36=5.84÷0.16=87.11÷3.1=2.5÷0.7=7.6×1.05=5.56÷0.83=9.58÷0.23=10.75÷12.5=0.42×0.308=2.7+3.13=8.08-2.68=5.546+29.38=17.04×0.26=8.35×3.5=得数保留一位小数:0.43×0.29≈52.6×0.23≈4.58×0.37≈1.55÷3.8≈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≈得数保留三位小数:2.5÷0.7=2.5÷0.7=3.25×9.04=用循环小数表示商:36.8÷16≈10.1÷3.3≈15.3÷11≈0.78÷11≈三、脱式计算(能简便计算的就简便计算)84.7×7-54.7×72.55×7.1+2.45×7.183×102-83×29.7×99+9.70.45×12×0.2=7.09×10.8-0.8×7.097.05×23.7+7.05×76.38.37×0.4+9.6×8.370.75×1028.9×99+8.96.24×101-6.2415.39×4.62+5.38×15.3910-6.06+8.5=4.3+3.91÷(22-19.7)178-145÷5×6+420.12×4.8÷0.12×4.86×0.25×1.8=24÷2.4-2.5×0.836.72÷4.25×9.9280+840÷24×5144÷3.6+27.2=2.8×1.43+0.57=(2.65+2.77)÷(1.98-0.98)=3.7×91.6+6.3×91.6=6.2×2.1-2.12.8-2.8×0.15=0.87×3.16+4.64=13.75÷0.125–2.75=6.8×0.75÷0.5=53+23.4÷7.2=24÷2.4-2.5×0.8=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=×6=3.416÷(0.016×35)=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=四、解方程4(x+0.3)=4.81.2x-0.8x=9.620+x=367x-55=590.7x=4.2(10-7.5)x=1x×1.8=0.9720.06×x=1.02x÷0.13=0.712.4÷x=31x-0.8x=612x-8x=4.81.2x=81.6x+5.6=9.4x-0.7x=3.691÷x=1.3x+8.3=10.715x=33x-8=163x+9=2718(x-2)=2707x+5.3=7.43x÷5=4.830÷x+25=851.4×8-2x=66x-12.8×3=0.06410-3x=170x+2x+18=78(200-x)÷5=303(x+0.5)=210.5x+8=436x-3x=180.273÷x=0.35(x-140)÷70=41.8x=0.972x÷0.756=909x-40=5x÷5+9=2148-27+5x=3110.5+x+21=560.1(x+6)=3.3×0.44(x-5.6)=1.67(6.5+x)=87.5(27.5-3.5)÷x=4(0.5+x)+x=9.8÷20.2x-0.4+0.5=3.74.2×3-3x=5.1(写检验过程)13.7—x=5.29(写检验)五、列式计算(1)一个数的25倍是37.75,这个数是多少?(2)比47.88与3.8的商大42.5的数是多少?(3)1.25乘4.2减5,差是多少?(4)比4.7的1.5倍多3.05的数是多少?(5)一个数的25倍是37.5,这个数是多少?(6)比47.88与3.8的商大42.5的数是多少?(7)60比一个数的3倍少30,这个数是多少?(8)一个数的4倍比60多24,这个数是多少?(9)用14.81与5.19的和,乘以它们的差,积是多少?(10)126.8与15.7的和,乘以1.02,积是多少?(11)0.6乘0.8的积加上0.12后,再除以1.2,商是多少?
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3.2×1.8±2.54 用简便方法计算
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(1)3.2*1.8+2.54=(3+0.2)*1.8+2.54=5.4+(0.36+2.54)=5.4+2.9=8.3(2)3.2*1.8+2.54=(2-0.2)*3.2+2.54=6.4+(2.54-0.64)=6.4+1.9=8.3
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3.2*1.8+2.54要怎么简便计算
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很多种简便算法啊(1)3.2*1.8+2.54=(3+0.2)*1.8+2.54=5.4+(0.36+2.54)=5.4+2.9=8.3(2)3.2*1.8+2.54=(2-0.2)*3.2+2.54=6.4+(2.54-0.64)=6.4+1.9=8.3(3)3.2*1.8+2.54=(2+1.2)*1.8+2.54=3.6+(2.16+2.54...
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