四年级下册数学同步练习-6单元6课时 用画线段图或列表的方法解决相遇问题-苏教版
http://t.cn/Ri466E4【精品】第6单元第6课时用画线段或列表的方法解决相遇问题(练习及解析)苏教版-四年级数学下册过几时后二人相距6千米?错误的算式是( )。A.(38+6)÷(5+3)B.(38-6)÷(5+3)C.6-38÷(5+3)(2)甲乙两个内河港口相距240千米,拖船顺水每时航行10千米,逆水每时航行8千米。在甲乙两港之间往返一次需要多少时间?正确算式是( )。A.240÷(10+8)B.240÷10+240÷8。[来源:Z|xx|k.Com][来源:学&科&网](3)根据应用题的条件和问题来选择正确算式[来源:学§科§网Z§X§X§K]东西两城相距405千...
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