Write equations that equal odd or even numbers (subtraction)

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Standard Alignments:

(A) Recall basic facts to add and subtract within 20 with automaticity

2.OA.1 Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.