The First Grade Common Core State Standard Operations and Algebraic Practice Kit was created specifically for supporting learners with the standard B.4, "Understand subtraction as an unknown-addend problemt".
The standard 1.OA.B.4 (Understand subtraction as an unknown-addend problemt) requires a learner to:
Think of subtraction problems as missing-addend addition problems; for example: 10 - 2 = ? can be thought of as 2 + ? = 10.
In this practice kit are two sets of Flip Cards and 3 worksheet activities, each focusing on the strategy of looking at subtraction as a "missing addend" addition problem. All printouts and manipulatives are included.
This, as well as all the other CCSS First Grade practice kits were created as a complement to the First Grade Common Core State Standard Mathematics Assessment Pack:
*** This CCSS practice kit is now bundled with other CCSS practice kits for a reduced price! *** http://www.teacherspayteachers.com/Product/First-Grade-CCSS-Operations-and-Algebraic-Thinking-Practice-Bundle
Download the preview for a partial peek at the kit. It is a reduced quality for conservation of file size.
This product is licensed with a Attribution-NonCommercial-NoDerivs 3.0 Unported. You may freely use this product for your own uses but not use it for commercial purposes.
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