三年级数学下册口算练习

2=97X90=450X8=3200*6=63X80=60X30=2400*9=29X90=590X3=26*2=5=67X90=30X70=4800*5=83X70=400X5=22*2=9=77X40=260X4=280*74=97X70=30X30=2000*6=33X20=10X50=4500*7=51X40=360X7=60*4=5=76X20=720X5=2400*8=17X90=660X7=119*76=84X80=330X7=1800*6=28X70=60X70=700*77=42X80=680X8=7200*2=86X20=120X7=150*58=61X50=150X4=160*22=14X50=730X2=2100*4=80X50=80X40=200*53=50X80=50X40=6400*7=11X90=930X8=150*56=18X70=90X20=120*28=95X20=20X60=420*74=47X40=720X7=400*52=12X20=20X20=50*5=8=59X70=40X70=320*46=40X30=50X10=200*8=24X50=670X8=28*23=32X80=950X9=2800*7=56X50=630X3=400*3=52X40=60X80=105*9=25X30=810X8=100*2=16X30=10X50=3600*6=41X20=190X8=140*6=50X50=280X5=2700*3=56X20=30X70=5400*4=50X20=350X5=3200*5=87X60=820X4=8100*5=60X20=10X90=280*5=69X60=270X9=160*8=21X50=10X60=5400*8=54X60=30X60=50*54=73X40=860X2=300*8=93X60=750X8=84*79=55X80=10X60=400*8=51X90=30X70=1200*7=13X20=60X20=88*87=59X20=30X40=540*2=56X40=250X8=4200*8=83X70=650X2=200*8=34X60=680X4=400*5=87X90=80X30=6300*3=10X80=230X8=2400*5=37X30=640X3=40*2=9=23X40=80X20=420*75=21X20=10X20=70*7=8=12X90=40X90=720*92=60X30=90X90=300*55=63X30=90X20=52*4=5=68X20=310X8=20*2=9=74X40=40X50=400*47=68X60=670X3=1500*6=92X20=10X30=90*5=7=78X60=510X2=300*34=28X70=80X80=42*3=3=92X20=910X3=5600*5=58X50=820X9=64*4=7=54X70=560X2=90*5=9=21X30=60X50=96*8=5=10X50=50X20=180*96=82X60=210X4=4000*2=17X40=540X6=560*73=13X20=180X7=5400*3=78X90=820X3=180*24=51X90=940X8=400*52=62X30=570X5=630*92=67X30=50X50=1800*4=68X80=780X8=150*37=52X90=40X90=120*26=72X20=160X5=6400*7=85X90=90X90=80*2=3=67X20=30X80=420*65=33X20=240X4=114*66=29X30=20X90=540*93=51X50=60X10=70*5=9=51X60=440X2=360*63=36X90=770X3=3200*6=87X90=10X20=1000*7=59X40=540X3=1600*9=46X80=390X2=144*86=11X90=570X6=4200*8=79X80=470X9=70*7=5=53X20=670X2=280*49=12X90=330X8=65*5=2=93X80=650X5=800*82=79X30=420X8=112*78=51X80=190X9=240*46=61X70=690X8=80*8=2=34X50=60X30=2800*6=88X40=180X5=3000*8=59X40=90X20=900*93=44X50=50X80=600*62=95X60=510X2=80*8=9=67X50=580X9=90*5=6=18X80=30X30=5400*5=15X90=370X6=80*5=3=85X20=550X8=800*...