4 + ____ = 9 10 + ____ = 14 ____ + 8 = 12 10 + ____ = 16 10 + ____ = 17 ____ + 10 = 20 10 + ____ = 19 3+ ____ = 11 ____ + 3 = 9 15 + ____ = 20

Missing Pieces in Equations Lesson 1

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