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6 11 - 4 11 = = 11 6 10 + 5 10 = = = Think, same or mixed sign? 3 9 - 7 9 = = 3 12 Think, same or mixed sign? - 7 12 = = Reduce = - Think, same or mixed sign? - 4 10 - 5 10 = = - 8 9 + 3 9 = = = 8 11 + 7 11 = = = 6 12 Think, same or mixed sign? - 9 12 = = Reduce = - Write as a mixed number. - Think, same or mixed sign? 6 12 - 9 12 = = = - = - Reduce Think, same or mixed signs? - 7 9 - 7 9 = = - = |