练习七,546=9(个),546=9(天),243=8(支),248=3(),246=4(本),244=6(个),8,3,4,6,7,4,6,9,7,9,24,6,4,24,24,3,8,24,24,8,4,6,8,3,56=30(元) 59=45(元) 30+45=75(元),8,15,24,