1.OA.1.Use+addition+and+subtraction+...

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Operations and Algebraic Thinking 1.OA 1.Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.
 * Represent and solve problems involving addition and subtraction. **

Think Math 1.4.6, 1.4.7 *”Mouse Count” (Teaching Number Sense-1st)p. 52-60 *Coming & Going Stories” (Teaching Number Sense-1st) p. 81-85 (2 days) *”Twelve Cats and Dogs” from Investigations Building Number Sense p. 38 Think Math 1.9.5, 1.9.6, 1.9.7, 1.9.8

*”Cows and Chickens” //Lessons for Algebraic Thinking// p. 99-113 (5 days)

K-5 math teaching resources website lessons: ( http://www.k-5mathteachingresources.com/1st-grade-number-activities.html)

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