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1、40-2= 70+90= 70+2=140-7= 70+50=421 - 7 52+35=720 - 8= 9X 799 9X 799= 80 - 4= 26+9=45 X 28 160-60=160-8= 150+40= 2100- 3= 50 X 80= 28-7= 500 X 4= 24 - 8= 12X 20= 35-5= 50-5= 3X 800= 420-7= 3X 220= 480-4= 58 + 33 = 420 - 20 = 93-3= 880-4= 1200-200= 11X7= 80 46 = 82 9 45+45= 50 X 90=42X985X5+52=90+30=9
2、0+40=170-90=110-30=50+80=110-80=50+90=400+300=21X30=660-6=65X10=540-6=22X40=80X80=10X47=30X70=093=600-6=10X36=660-3=43+38=720-8=36+56=23X30=10X73=90X50=800-8=6000+2000120X4=6402=52X94250-5=63-9=280-4=50X50=810-9=300X6=25+41=140-7=20X31=90-65=52X44-74X5441X7540X70=131-6900-3=57+29=125-24X9-6=909=1600
3、-2=71-68=600-仁1500-3=9X300=3X200=620-2=660-2=6408=880-4=7500-500=091二12X4=3X31=58+26=120X4=0X97=360-9=44X2=960-3=32X2=2X440=4602=70+500=3X33=280-4二9X400=3X330=690-3=11X40=900X5=6749=200-4=80001000=20X24=57+29=540-6=10X73=10X58=0+49=34X20=80X90=30X70=120X4=640+8=720+9=10X34=65X10=660+3=700X5=41X20=70
4、00399030X30=10X47=30X23=660+6=59005000=11X40=70X40=10X36=6000+2000=80X80=29+14=80X50=200X4=36+56=88X10=600-6=22X30=400+600=34+29=800-8=21X30=720-8=33X30=32X20=87X10=500+40=22X40=440-4=33X20=320-4=83977-29=093=6402=30X50=75+18=600+700=210-7=3X8=80-2=40X10=180-3=80X99280-4=90X100=8+1X8=20+90=80+20=130
5、-2=310X3=390-3=230X3=11X4=82-55二310X3=720-9=4700-700=600-3=48+28=6418480-8=7X50=880-8=87989X500=80+17=54+28=42X3=1700-800=90-3=180-3=3005=930-3=800-4=60-15=900-3=450-9=360-6=37+56=32X3=70X7=1200-715=299一650X7=0X37=53-14二17+27=840-4=2X14=140-2=660-6=7X800=7X700=840-2=430X2=540-9=31X3=13X3=34+56=96-3二
6、2X330=50X6=1594620-2=6X800=960-3=1500-903=1807-800=63-3=26+57=800-8=33+57=600X3=37+8=480-8=630-3=62-33二500+500=33X2=800-2=700-8=0-47=560-7=440-4=93-3=24X2=054=23X3=12X30=7X80=48X10=40X40=40X10=89-3=562-7241-230-(3-1)=24X2-3=054=(23-3)X3=13X30=7X81=53X10=60X70=23X30=60X50=70X80=10X68=40X50=30X21=7X11
7、=50X70=24X2=30X70=10X74=50X10=70X11=30X40=24X20=12X20=30 x 21 = 20X 70= 28x 1 = 20x 13= 1x 36= 10x 19= 11 x 50= 30 x 30= 28x 10= 20x 50= 10x 36= 30 x 33= 21X40= 12x 10= 31 x2= 14X 20= 6x 90= 20x 33= 90 x 20= 20x 13= 31 x 20= 22x3= 60 x 90= 39 x 10= 21x2= 44 x 20= 12x 4= 22 x 30= 22x4= 30 x 80= 33 x
8、10= 50 x 90= 12x 40= 220x 3= 22 x 40= 90 x 40= 200x 3= 41 x 20=21x30=10x46=3x700=33x30=20x41=6x600=24x20=50x30=Ox45=50x70=800x7=723-910x89=69x10=13x30=23x30=4x90=60x60=60x40=90x30=21x40=30x20=40x90=2x31=33x20=40x70=48+19=70x6=4x900=2x310=20+35=45+35=32X20=70x60=84x1=900x6=34X20=33x30=31x20=702x6=84x
9、10=9x800=70x30=2x42=86-47二5x90=22x30=6x500=8x70=42x20=400+300=5x900=10x33=22x0=80x70=201x4=020=6x60=22x40=44+20=41x3943x20=46+37=420一6=300-6=40x11=360-9=10x34=40x90=90x60=490-7=20x34=300x3=80x4=65x0=330-3=250-5=680-80=21x40=80x40=10x37=20x50=2000+300=880-2=70x20=400-4=Ox66=50x30=6408=880-4=400+300=3
10、4+39=360-6=99X10=12x20=30x80=41x20=97x10=700-7=33x30=059=11x80=200-4=31x20=600+90=4700-700=44-37二40x12=84-47二630-7=71-23=043=31x30=21x30=43X2=OX20=75+18=23+48=90X30=30X12=46+24=073=42X20=100一5=10X50=350-5=52-29=240X2=52+39=400-8=4808=33X30=50X5=800X3=60X50=41OX2=41X20=31OX3=20X23=440-4=30X32=OX35=10
11、X35=29+61=410730X30=50X90=80X30=20X14=90X50=420一6=300-6=240-4=69X10=22X40=33X20=900-9=70X11=4500-500=20X40=4004=49+33=707-7=23X3=78-36=11X4=230X3=46910-5=90+20=17-8=180-80=350-5=40X70=43+38=90X50=84-65=43-16=10X80=51X82500+40=88X10=700X5=81X9940X70二440-4=32X3=48-4二540-9=90-9=13X3=600X7=120X3=480-2=3
12、9-3二560-8=990-3=420-2=63-3=1604=800+700=690-3=58-0=2X440=48-2=480-2=60X5=2X44-840-4-0*510X8570*75X90084*4一930*3一83-5729+68684980X7330*3一3X2342X4266X5466+26=131*683*9150-60=700+600=150*245X5270+80=110-6=65*957-381500-70042X299*3一770*7660*3一960*3一180*9一65+15660*6一800X2一140*2=400*8=480*6=30X5=0*4=240*6=160*2=90*3=75*1=320*8=400*4=240*4=5400*9=
