苏教版三年级数学下册口算专项综合练习·20201.列竖式计算。①11.6+1.6=   ②3.7+2.3=     ③34.4+42.5=④7.4-4.7=     ⑤76.5-52.4=   ⑥9-0.6=2.直接写得数。65×20=    560÷8=    505÷5=25×40=    603÷3=    150÷2=3.直接写出得数。63×40=   627÷3=   9.3-0.8=   6.7+2.3=49×28≈   195×5≈    283÷7≈   807÷9≈4.想一想，算一算。400+______=620          ______+70=430            660+______=900530-______=210           ______-350=640           840-______=4805.口算下面各题．300×40=______100×60=______12×50=______16×50=______25×20=______700×60=______17×30=______300×40=______6.填一填。104=99+______ 705=699+______  902=899+______7.口算30×2=        40×2=       40×4=        40×5=50×5=        60×2=       60×3=        60×4=80×4=        80×2=       90×9=        90×6=8.直接写得数3×324=102×8=302×5=5×116=9.直接写得数34×2=______11×2=______20×4=______23×3=______3×33=______\n10.直接写出得数。10-4.5=    150×6=     96÷3=    7.8+3.2=200×15=   2100÷7=   43×21≈    298÷3≈11.填写下列表格。2.5+3.6=______7.43.8______0.90.7______9.18.9______6.24.8______4.3-2.9=______7.16.9______5.51.8______6.61.1______87.2______12.你能很快地填出下面各题的得数吗?14×11=（______）   25×11=（______）   36×11=（______）53×11=（______）   61×11=（______）   81×11=（______）13.用简便方法计算下面各题。400-86=         108-99=       708-329=        201-182=14.口算．30×3=______22×3=______33×2=______15.直接写得数．21×6=______23×2=______32×3=______44×2=______16.口算我能行．10×6=______2×30=______4×21=______3×23=______\n17.口算下面各题。   0÷6=          0÷3=        5×0=         4—0=            0+60=18.直接写出得数。96÷6=    25×40=     19.算一算20.口算下列各式。13×2=______24×3=______23×4=______25×2=______130×3=______220×4=______34×2=______460×2=______21.百灵口算42÷2=      36÷3=      55÷5=        66÷3=39÷3=      88÷4=      48÷4=        63÷3=96÷3=      82÷2=      77÷7=        93÷3=22.口算下列各题。81×4=______12×60=______80×70=______22×7=______50×30=______12×40=______430×2=______450×3=______24×50=______40×32=______23.直接写出得数。60×13=   99×10=    360÷9=   208÷2=24.口算150÷3=          150÷5=         240÷4=        240÷3=640÷8=          450÷9=         140÷7=        540÷6=320÷8=          400÷5=         420÷6=\n25.先估一估商是几位数，再计算。615÷5=        462÷2=          963÷3=666÷6=        875÷7=          896÷8=26.问题：估一估下面各题的得数。298×4≈______312×2≈______388×3≈______415×2≈______27.口算下列各式。400÷2=______48÷4=______909÷9=______270÷9=______63÷3=______48÷2=______240÷4=______0÷29=______4200÷6=______28.口算500-230=   305÷5=   0+6=      20×30=38+125=     27×40=   360÷9=   12×0=50×80=    140×52   29.口算．32×2=______44×2=______13×2=______21×4=______30.直接写出得数14×5=______16×6=______48×2=______