三年级上册数学口算题 500 道23X5=79X8=510-369=240-199=3000=5 二960=6=630=9=4800=8=14X50=50X60=18X30=72=4=760=4=25X30=64=8=96-77=800X5=30X15=690=3=16-07=679-123=8X25=37X3=23X7=53X30=18+34=51-4=400=5=200X4=300X4=24+54=51-3=20X8=54=6=300=5=39=3=20X36=4X25=27-12=65+0=500X4=13X2=31X2=12X4=46X20=65=5=60X50=120=2=600=5=86+67=87-69=25X30=50X70=460=2=900=3=67+32=72=8=75+25=600X8=42+58=30X4=70X3=18X4=60X7=66+19=260=2=04+23=08-07=100X2=28+2=40=2=42=7=66=6=64=8=450X2=656+17=50X8=69X2=77X5=99X5=990=9 二76-27=61-27=34-28=36-12=17X4=68-17=20-14=80=4=100-25=180+147=77X7=650=5=45X10=300X9=19+4=6X7=100X7=34X2=24X2=24X6=30X9=70=5=120=4=28X20=480=4=840=3=36+12=50X6=60X9=70X7=120=6=120=2=280=2=100X0=80X90=37+22=480=8=98=7=640=2=70X5=80X5=14X5=300-84=900X9=87-49=24X5=81-05=26-03=70-31=12+51=420=3=34-18=49+216=160=8=47+02=48=