作业帮这三题肿么写要用简便计算：2.4×20.6+33.1×7.6465×8.2+465×29.6-365×37.84.25×166-42.5×14.2+24×5.75
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/30 11:11:34
这三题肿么写要用简便计算：2.4×20.6+33.1×7.6465×8.2+465×29.6-365×37.84.25×166-42.5×14.2+24×5.75
这三题肿么写要用简便计算：2.4×20.6+33.1×7.6
465×8.2+465×29.6-365×37.8
4.25×166-42.5×14.2+24×5.75
这三题肿么写要用简便计算：2.4×20.6+33.1×7.6465×8.2+465×29.6-365×37.84.25×166-42.5×14.2+24×5.75
2.4×20.6+33.1×7.6
=2.4*20.6+33.1(10-2.4)
=331-2.4*(33.1-20.6)
=331-2.4*12.5
=331-0.3*8*12.5
=331-30
=301
465×8.2+465×29.6-365×37.8
=465*(8.2+29.6)-365*37.8
=37.8*(465-365)
=37.8*100
=3780
=
4.25×166-42.5×14.2+24×5.75
=4.25*(166-142)+24*5.75
=4.25*24+24*5.75
=24*(4.25+5.75)
=24*10
=240 .
2.4×20.6+33.1×7.6
=4*(0.6*20.6+33.1*1.9)
=4*[12.36+33.1*(2-0.1)]
=4*(12.36+66.2-3.31)
=4*(78.56-3.31)
=4*75.25
=4*25*3+4*0.25
=300+1
=301
465×8.2+465×29.6-365×37.8<...
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2.4×20.6+33.1×7.6
=4*(0.6*20.6+33.1*1.9)
=4*[12.36+33.1*(2-0.1)]
=4*(12.36+66.2-3.31)
=4*(78.56-3.31)
=4*75.25
=4*25*3+4*0.25
=300+1
=301
465×8.2+465×29.6-365×37.8
=465*8.2+465*29.6-(465-100)*37.8
=465*8.2+465*29.6-465*37.8+37.8*100
=465*(8.2+29.6-37.8)+3780
=465*0+3780
=3780
4.25×166-42.5×14.2+24×5.75
=42.5*166-42.5*14.2+24*(10-4.25)
=42.5*16.6-42.5*14.2+240-2.4*42.5
=42.5*(16.6-14.2-2.4)+240
=42.5*0+240
=240
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