一年级数学上册口算题：6和7加减
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2018-02-28 16:04:15
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6 = 6+ 7 - 3 = 7 = 3+ 6 - 0 =
6 = 3+ 7 - 5 = 7 = 3+ 6 - 5 =
6 = 4+ 7 - 0 = 7 = 5+ 6 - 2 =
6 = 2+ 7 - 0 = 7 = 1+ 6 - 1 =
6 = 6+ 7 - 2 = 7 = 6+ 6 - 1 =
