# Addition & Subtraction 1st Grade: Activities by the Standards OA Bundle        Subject
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1. First grade math teachers, THIS is the bundle for you to save you time and make your math instruction fun and meaningful for your students with very little prep for you! No need to pull activities from difference sources each week, this bundle has everything you need, all in one place, for a year of
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• Bundle Description
• StandardsNEW
Addition and Subtraction: This bundle includes one pack for each Operations & Algebraic Thinking Common Core first grade math standard.

****This is part of my First Grade Activities By the Standards Bundle. If you've already purchased that, you don't need to purchase this.****

If you want to streamline your math instruction, cut out planning time, and ensure that you hit every first grade math skill in the Operations & Algebraic Thinking strand, than this is the pack for you.

Each pack in the bundle contains:
Teach It Guide
Original, Fun Song
Posters for teaching content
Interactive Notebook Activities
At least 5 practice pages/activities
Assessment Checklist

*Note: You can see each pack in it's entirety by clicking on the links below and then clicking on the links below and then viewing the previews.

This bundle includes packs for the following skills:
Operations & Algebraic Thinking:
Addition and Subtraction Word Problems (1.OA.A.1)
Adding 3 Numbers Word Problems (1.OA.A.2)
Commutative & Associative Properties of Addition (1.OA.B.3)
Subtraction as an Unknown Addend Problem(1.OA.B.4)
Relating Addition and Subtraction to Counting (1.OA.C.5)
Add & Subtract within 20 (Fluent within 10) (1.OA.C.6)
True & False Equations & Equal Sign (1.OA.D.7 )
Determining the Unknown Whole Number: Add & Subtract (1.OA.D.8)

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Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = ▯ - 3, 6 + 6 = ▯.
Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false. For example, which of the following equations are true and which are false? 6 = 6, 7 = 8 - 1, 5 + 2 = 2 + 5, 4 + 1 = 5 + 2.
Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).
Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).
Understand subtraction as an unknown-addend problem. For example, subtract 10 – 8 by finding the number that makes 10 when added to 8.
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