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四年级下册数学口算练习题

72－45=          360－85=           720÷45÷2=           50×50=

32×30=           22×30=              6×201=              25×40=

17×5=            4×60=               4500÷900=           150×20= 

170+90=          4800÷40=           14×201=              254+99=

80÷16=           4200÷20=           2500÷50=             25×4=

16×5=            32×20=              67×4=               62+18=               

125×6=           48×25=             780÷20=             12×40=

3000+200=        48×125=            35×8=               320×2=

80－4=           420÷35÷2=          25×32=              720÷9÷4=

15＋22=           4500÷45=           521－305=         41－23=

45÷15=           78÷2=              45×12=              630÷90=

6×85=            69÷23=             67+25=              9600÷30=

710－420=        50×90=             22×8×5=             624－198=

560÷35÷2=        2400÷40=          3600÷60=             87÷3=　12×5=            6300÷30=           690－420=           45+45=

102+284=         480+290=           930÷30=            7000÷70=

23×3=             800×30=            2100÷70=           375+99=

612÷12=           360+140=          1800÷30=           45×6=

880÷20=           45×14=             3×90=             41－23=

25×16=           48×9=              696÷3=               26×20= 32+15=            28×7=              40×60=            25＋40=

32×20=            468+197=           6×80=             3500÷25÷2=

4700÷10=          729+301=           45－18=           67+28=

2400÷20=          25×6×4=            25×28=            5600÷16

15×6=             125×48=            125×16=           2800÷25÷