文档介绍：口算(一)200+180=56+125=400-70=71+28=35弋二90+150=6X8=36-18=910-90=38^7=220+150=6X9=78乜二45-27=720-180=9X9=290-40=770-160=6X7=40侔600+270=620+150=3X7=7X7=37%=56^9=760+100=750+125=200+50=430+27=4X6=19乜二720-70=820-128=33-17=71-43=81乜二72乜二71-24=250-60=66^8=5X5=28^7=33%=15+43=58-36=6X6=60+350=840+90=5X9=43^7=460-72=13%=9X4=34+23=34+56=30+540=620-57=11^5=67-53=口算(二)52+81=9X9=83^9=330-172=8^6=62+52=38+52=5X6=41十5=75+75=70+18=5X4=36备70-18=900-80=70+450=36^7=44弋=58+14=78-23=94-46=7X8=8X7=52^7=6X4=500+700=30+38=84-12=2300-500=44+23=4X4=2X2=7X2=520-30=980-400=6X3=750+60=8X1=8X2=17^5=300+70=760-500=8X3=26^3=38亠7=700-300=270-80=7X3=22亠7=100-45=8X4=2X6=370-230=69+30=9X6=33^6=32^4=1X1=120-30=5X4=口算(三)9X2=6X3=200+90=69+40=67芫=64^8=26+36=19+47=220+170=4X7=19^3=21^3=69+32=680-120=770+630=3X3=120-40=402X5=25X4=450X0=360-90=11+60=630X3=560+40=72-24=9+50=630+70=120X5=24X5=70X8=250X5=14+40=880X2二40X8=57-28=801X9=120+20=250X1=28+68=100X0=30X6=18X3=902X1=17X4=68-4=48-16=70X2=200X8=280-70=320X8=30X6=180-60=140-5=125X8=560+80=150X2=700X2=72X3=42+30=902X6=口算(四)120—40=402X5=25X4=450X0=360—90=11+60=630X3=560+40=72—24=9+50=630+70=120X5=24X5=70X8=250X5=14+40=880X2=40X8=57—28=801X9=120+20=250X1=28+68=100X0=30X6=18X3=902X1=17X4=68—4=48—16=70X2=200X8=280—70=320X8=30X6=180—60=140—5=125X8=560+80=150X2=700X2=72X3=42+30=902X6=590+70=800X5=440X0=25+16=303X3=12X2=470+70=64X0=25X8=72X6=20X6=90X3=420X6=280+40=55X5=48X4=口算(五)1