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九 整理与复习【数的世界·100页】1.80÷20=4 150÷50=3 630÷70=92×45=90 92÷2=46 51÷3=17300÷60=5 560÷8=70 480÷80=62.192÷30=6......12 990÷60=16......30192÷34=5......22 990÷62=15......60192÷38=5......2 990÷66=153.604÷21=28......16 684÷57=12 890÷35=25......15 904÷18=50......4 4.770÷30=25......20 5600÷400=11 9800÷320=30......200 5. (274-49)÷75=225÷75=3（时）答：还需3小时才能到达上海。6. (32+48)×(97-57) 84-80÷16×12=80×40 =84-5×12=3200 =84-60 =24 972÷(720-21×33) 125÷[(572+78)÷26]=972÷(720-693) =125÷[650÷26]=972÷27  | 