2.OA.2.+Fluently+add+and+subtract+...

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Operations and Algebraic Thinking 2.OA 2. Fluently add and subtract within 20 using mental strategies.2 By end of Grade 2, know from memory all sums of two one-digit numbers.
 * Add and subtract within 20. **

Pgs. 65 – 76; 94 – 111; 157 – 185
 * __ Combining and Comparing __ : Close to 100 (Investigation 1: 1 - 2)
 * __ Putting Together and Taking Apart __ : Working Within 100 (Investigation 2: 1 - 4)
 * __ Putting Together and Taking Apart __ : Capture 5 (Investigation 5: 2 - 3)
 * John Van de Walle and LouAnn Lovin, __Teaching Student-Centered Mathematics K-3__:
 * Origo:A//ddition/Subtraction// // Fluency Kits; Mathementals 2; //// Think Tanks //

__ Bridges in Mathematics __

//**Think Math**// Lessons** 1.4-1.5; 1.7; 1.9; 2.1; 2.3-2.5; 2.7; 8.2-8.4 **