文档介绍：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