15 + ____ = 20 20 + ____ = 24 20 + ____ = 28 15 + ____ =21 19 + ____ = 26 10 + ____ = 20 11 + ____ = 20 6 + ____ = 14 ____ + 7 = 13 14 + ____ = 23

Missing Pieces in Equations 20 Lesson 2

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