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1、5.4÷1.8+240×1.5=3+360=3639000÷72×(1.25×0.7×8)=9000÷72×7=125×7=8751.25×(8+10)=1.25×8+1.25×10=10+12.5=22.51.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.781/2-(4/5-1/2)=1/2+1/2-4/5=1-4/5=1/54800÷25÷4=4800÷(25x4)=4800÷100=4800÷100=482/5-(3/8-3/5)=2/5+3/5-3/8=1-3/8=5/83/4-(3/7-1/4)=3/4+1/4-3/7=1-3/7=4/73.2x0.125x2.5=0.125x8x(0.4x2.5)=1x1=10.4×125×25×0.8=(0.4×25)×(125×0.8)=10×100=10001.25×(8+10)=1.25×8+1.25×10=10+12.5=22.59123-(123+8.8)=9123-123-8.8=9000-8.8=8991.21.24×8.3+8.3×1.76=8.3×(1.24+1.76)=8.3×3=24.99999×1001=9999×(1000+1)=9999×1000+9999×1=1000899914.8×6.3-6.3×6.5+8.3×3.7=(14.8-6.5)×6.3+8.3×3.7=8.3×6.3+8.3×3.7=8.3×(6.3+3.7)=8.3×10=831.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78933-157-43=933-(157+43)=933-200=7334821-998=4821-1000+2=382332×125×25=4×8×125×25=(4×25)×(8×125)=100×1000=1000001.8+18÷1.5-0.5×0.3=1.8+12-0.15=13.8-0.15=13.656.5×8+3.5×8-47=52+28-47=80-47=333.7x2.56-2.3=9.472-2.3=7.1721.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.781/2-(4/5-1/2)=1/2+1/2-4/5=1-4/5=1/54800÷25÷4=4800÷(25x4)=4800÷100=4800÷100=482/5-(3/8-3/5)=2/5+3/5-3/8=1-3/8=5/83/4-(3/7-1/4)=3/4+1/4-3/7=1-3/7=4/73.2x0.125x2.5=0.125x8x(0.4x2.5)=1x1=10.4×125×25×0.8=(0.4×25)×(125×0.8)=10×100=10001.25×(8+10)=1.25×8+1.25×10=10+12.5=22.59123-(123+8.8)=9123-123-8.8=9000-8.8=8991.21.24×8.3+8.3×1.76=8.3×(1.24+1.76)=8.3×3=24.961-(1.25+2.5×0.7)=61-3=58[(10-0.8)+9.85]-2÷0.125=19.05-2÷0.125=19.05-16=3.05408－12×24=408-288=120（46＋28）×60=74x60=444042×50－17=2100-17=208332＋105÷5=32+21=53420×（327－238）=420x89=37380(4121+2389)÷7=6510÷7=9303.416÷（0.016×35）=3.416÷0.56=6.10.8×[(10－6.76)÷1.2]=0.8x(3.24÷1.2)=0.8x2.7=2.165.67×0.2-0.62=1.134-0.62=0.5140.4×0.7×0.25=0.4x0.25x0.7=0.1x0.7=0.070.78+5.436+1=6.216+1=7.21630.8÷[14－(9.85＋1.07)]=30.8÷(14-10.92)=30.8÷3.08=10[60－(9.5＋28.9)]÷0.18=(60-38.4)÷0.18=21.6÷0.18=1202.881÷0.43－0.24×3.5=6.7-0.24x3.5=6.7-0.84=5.865.38+7.85-5.37=13.23-5.37=7.867.2÷0.8-1.2×5=9-6=36-1.19×3-0.43=6-3.57-0.43=6-(3.57+0.43)=6-4=26.5×（4.8-1.2×4）=6.5x(4.8-4.8)=6.5x0=00.68×1.9+0.32×1.9=(0.68+0.32)x1.9=1x1.9=1.910.15-10.75×0.4-5.7=10.15-4.3-5.7=10.15-(4.3+5.7)=10.15-10=0.155.8×（3.87-0.13）+4.2×3.74=5.8x3.74+4.2x3.74=(5.8+4.2)x3.74=10x3.74=37.420×[(2.44－1.8)÷0.4＋0.15]=20x(0.64÷0.4+0.15)=20x(1.6+0.15)=20x1.75=3528-(3.4+1.25×2.4)=28-(3.4+3)=28-6.4=21.62.55×7.1+2.45×7.1=(2.55+2.45)x7.1=5x7.1=35.50.8×〔15.5-(3.21+5.79)〕=0.8x(15.5-9)=0.8x6.5=5.2（31.8+3.2×4）÷5=(31.8+12.8)÷5=44.6÷5=8.9231.5×4÷(6+3)=126÷9=142÷2.5+2.5÷2=0.8+1.25=2.05194－64.8÷1.8×0.9=194-36x0.9=194-32.4=161.65180－705×6=5180-4230=95024÷2.4－2.5×0.8=10-2=8405×(3213-3189)=405x24=9720125×(97-81)=125x16=20006942+480÷3=6942+160=678220+80÷4-20=20+20-20=40-20=20100÷（32-30）×0=100÷2x0=50x0=025×4-12×5=100-60=4070×〔（42-42）÷18〕=70x(0÷18)=70x0=075×65+75×35=75x(65+35)=75x100=75006-1.6÷4=6-0.4=5.632.52-（6+9.728÷3.2）×2.5=32.52-(6+3.04)x2.5=32.52-9.02x2.5=32.52-22.55=9.97（136+64）×（65-345÷23）=200x(65-15)=200x50=10000。

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